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Diatomaceous earth - Revision history



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Last Build Date: Fri, 09 Dec 2016 11:34:52 GMT

 



NickGarvey: /* Pest control */ update dead reference

Wed, 30 Nov 2016 07:07:55 GMT

‎Pest control: update dead reference ← Previous revision Revision as of 07:07, 30 November 2016 Line 79: Line 79:       === Pest control ===   === Pest control === − Diatomite is used as an [[insecticide]], due to its abrasive and physico-[[sorptivity|sorptive]] properties.{{cite conference|url= http://home.cc.umanitoba.ca/~fieldspg/fields/de-test-p.pdf |title= Standardized testing for diatomaceous earth |last1= Fields |first1= Paul |last2= Allen |first2= Sylvia |first3= Zlatko |last3= Korunic |first4= Alan |last4= McLaughlin |first5= Tanya |last5= Stathers |date= July 2002 |publisher= Entomological Society of Manitoba |booktitle= Proceedings of the Eighth International Working Conference of Stored-Product Protection |pages= |location= York, U.K. |id= }} The fine powder absorbs [[lipids]] from the waxy outer layer of insects' [[exoskeleton]]s, causing them to dehydrate. [[Arthropod]]s die as a result of the water pressure deficiency, based on [[Fick's law of diffusion]]. This also works against [[gastropod]]s and is commonly employed in gardening to defeat [[slug]]s. However, since slugs inhabit humid environments, efficacy is very low. It is sometimes mixed with an attractant or other additives to increase its effectiveness. The shape of the diatoms contained in a deposit has not been proven to affect their functionality when it comes to the absorption of liquids; however, certain applications, such as that for slugs and snails, do work best when a particular shaped diatom is used. For example, in the case of slugs and snails large, spiny diatoms work best to lacerate the epithelium of the mollusk. Diatom shells will work to some degree on the vast majority of animals that undergo [[ecdysis]] in shedding [[cuticle]], such as [[arthropod]]s or [[nematodes]]. It may have some effect also on [[lophotrochozoan]]s, such as [[mollusk]]s or [[annelid]]s. + Diatomite is used as an [[insecticide]], due to its abrasive and physico-[[sorptivity|sorptive]] properties.{{cite conference|url= http://home.cc.umanitoba.ca/~fieldspg/fields/fields-de-test-2002.pdf |title= Standardized testing for diatomaceous earth |last1= Fields |first1= Paul |last2= Allen |first2= Sylvia |first3= Zlatko |last3= Korunic |first4= Alan |last4= McLaughlin |first5= Tanya |last5= Stathers |date= July 2002 |publisher= Entomological Society of Manitoba |booktitle= Proceedings of the Eighth International Working Conference of Stored-Product Protection |pages= |location= York, U.K. |id= }} The fine powder absorbs [[lipids]] from the waxy outer layer of insects' [[exoskeleton]]s, causing them to dehydrate. [[Arthropod]]s die as a result of the water pressure deficiency, based on [[Fick's law of diffusion]]. This also works against [[gastropod]]s and is commonly employed in gardening to defeat [[slug]]s. However, since slugs inhabit humid environments, efficacy is very low. It is sometimes mixed with an attractant or other additives to increase its effectiveness. The shape of the diatoms contained in a deposit has not been proven to affect their functionality when it comes to the absorption of liquids; however, certain applications, such as that for slugs and snails, do work best when a particular shaped diatom is used. For example, in the case of slugs and snails large, spiny diatoms work best to lacerate the epithelium of the mollusk. Diatom shells will work to some degree on the vast majority of animals that undergo [[ecdysis]] in shedding [[cuticle]], such as [[arthropod]]s or [[nematodes]]. It may have some effect also on [[lophotrochozoan]]s, such as [[mollusk]]s or [[annelid]]s.       Medical-grade diatomite has been studied for its efficacy as a [[deworming]] agent in cattle; in both studies cited the groups being treated with diatomaceous earth did not fare any better than control groups.{{cite journal |last=Lartigue |first=E. del C. |la[...]



GreenC bot: 2 archive templates merged to {{webarchive}} (WAM)

Sun, 13 Nov 2016 20:59:36 GMT

2 archive templates merged to {{webarchive}} (WAM) ← Previous revision Revision as of 20:59, 13 November 2016 Line 45: Line 45:       === Other deposits ===   === Other deposits === − In Germany, diatomaceous earth was also extracted at [[Altenschlirf]]http://www2.natpa.de/bonifatius/senken/p7.htm Über den früheren Abbau von Kieselgur im Vogelsberg/Hessen {{wayback|url=http://www2.natpa.de/bonifatius/senken/p7.htm |date=20070928020701 }} on the [[Vogelsberg]] ([[Upper Hesse]]) and at [[Klieken]][http://homepages.compuserve.de/tmby100/kieselgur.htm Geschichte des Kieselgurabbaus in Klieken] {{wayback|url=http://homepages.compuserve.de/tmby100/kieselgur.htm |date=20080420063824 }} ([[Saxony-Anhalt]]). + In Germany, diatomaceous earth was also extracted at [[Altenschlirf]]http://www2.natpa.de/bonifatius/senken/p7.htm Über den früheren Abbau von Kieselgur im Vogelsberg/Hessen {{webarchive |url=https://web.archive.org/web/20070928020701/http://www2.natpa.de/bonifatius/senken/p7.htm |date=September 28, 2007 }} on the [[Vogelsberg]] ([[Upper Hesse]]) and at [[Klieken]][http://homepages.compuserve.de/tmby100/kieselgur.htm Geschichte des Kieselgurabbaus in Klieken] {{webarchive |url=https://web.archive.org/web/20080420063824/http://homepages.compuserve.de/tmby100/kieselgur.htm |date=April 20, 2008 }} ([[Saxony-Anhalt]]).       There is a layer of diatomaceous earth up to {{convert|4|m|ft}} thick in the nature reserve of [[Soos (Nature reservation)|Soos]] in the Czech Republic.   There is a layer of diatomaceous earth up to {{convert|4|m|ft}} thick in the nature reserve of [[Soos (Nature reservation)|Soos]] in the Czech Republic. [...]



Cjmnyc: Diatoms are algae, not protozoa

Mon, 24 Oct 2016 07:01:10 GMT

Diatoms are algae, not protozoa ← Previous revision Revision as of 07:01, 24 October 2016 Line 4: Line 4:   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}     − Diatomaceous earth consists of fossilized remains of [[diatom]]s, a type of hard-shelled [[protozoa]]. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]]. + Diatomaceous earth consists of fossilized remains of [[diatom]]s, a type of hard-shelled [[algae]]. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]].       == Geology and occurrence ==   == Geology and occurrence == [...]



GeoWriter: /* See also */ added "Siliceous ooze"

Tue, 11 Oct 2016 10:10:21 GMT

See also: added "Siliceous ooze"

← Previous revision Revision as of 10:10, 11 October 2016
Line 152: Line 152:
 
* [[Rock flour]]
 
* [[Rock flour]]
 
* [[Silica aerogel]]
 
* [[Silica aerogel]]
  +
* [[Siliceous ooze]]
 
* [[Zeolite]]
 
* [[Zeolite]]
   



Deli nk: Reverted edits by 2405:204:5404:12FF:409F:2557:B2B3:DA18 (talk) to last version by Bender the Bot

Wed, 28 Sep 2016 19:12:21 GMT

Reverted edits by 2405:204:5404:12FF:409F:2557:B2B3:DA18 (talk) to last version by Bender the Bot ← Previous revision Revision as of 19:12, 28 September 2016 Line 153: Line 153:   * [[Silica aerogel]]   * [[Silica aerogel]]   * [[Zeolite]]   * [[Zeolite]]   +   + == References ==   + {{Reflist|30em}}       == External links ==   == External links == [...]



2405:204:5404:12FF:409F:2557:B2B3:DA18: CENGAGE Learning

Wed, 28 Sep 2016 18:34:17 GMT

CENGAGE Learning

← Previous revision Revision as of 18:34, 28 September 2016
Line 153: Line 153:
 
* [[Silica aerogel]]
 
* [[Silica aerogel]]
 
* [[Zeolite]]
 
* [[Zeolite]]
 
== References ==
 
{{Reflist|30em}}
 
   
 
== External links ==
 
== External links ==



Bender the Bot: http→https for Google Books and Google News using AWB

Fri, 23 Sep 2016 09:23:06 GMT

http→https for Google Books and Google News using AWB ← Previous revision Revision as of 09:23, 23 September 2016 Line 73: Line 73:   === Filtration ===   === Filtration ===   The [[Celle]] engineer Wilhelm Berkefeld recognized the ability of diatomaceous earth to filter, and he developed tubular filters (known as filter candles) fired from diatomaceous earth.[http://www.berkefeld.com/en/company/history/ ELGA Berkefeld Water Treatment History] During the [[cholera]] [[epidemic]] in [[Hamburg]] in 1892, these [[Berkefeld filter]]s were used successfully.   The [[Celle]] engineer Wilhelm Berkefeld recognized the ability of diatomaceous earth to filter, and he developed tubular filters (known as filter candles) fired from diatomaceous earth.[http://www.berkefeld.com/en/company/history/ ELGA Berkefeld Water Treatment History] During the [[cholera]] [[epidemic]] in [[Hamburg]] in 1892, these [[Berkefeld filter]]s were used successfully. − One form of diatomaceous earth is used as a [[filter (chemistry)|filter]] medium, especially for swimming pools. It has a high porosity because it is composed of microscopically small, hollow particles. Diatomaceous earth (sometimes referred to by trademarked brand names such as Celite) is used in chemistry as a filtration aid, to filter very fine particles that would otherwise pass through or clog [[filter paper]]. It is also used to filter water, particularly in the [[drinking water]] treatment process and in [[aquarium|fish tanks]], and other liquids, such as [[beer]] and [[wine]]. It can also filter [[syrup]]s, [[sugar]], and honey without removing or altering their color, taste, or nutritional properties.{{Cite journal|last=Root|first=A.I.|authorlink=|author2=E.R. Root|author-separator=|editorn=|editorn-last=|editorn-first=|editor-link=|editorn-link=|others=|title=The ABC and xyz of bee culture|type=|url=http://books.google.com/?id=i0PoSYNEsh0C&pg=PA387&lpg=PA387&dq=diatomaceous+earth+%22does+not+remove%22#v=onepage&q=diatomaceous%20earth%20%22does%20not%20remove%22&f=false|archiveurl=|archivedate=|format=|accessdate=March 8, 2011|edition=|series=|volume=|date=March 1, 2005|origyear=|publisher=Kessinger Publishing|location=|language=|isbn=978-1-4326-2685-3|oclc=|doi=|doi_inactivedate=|bibcode=|id=|page=387|pages=|nopp=|at=|chapter=|chapterurl=|quote=|laysummary=|laydate=|separator=|postscript={{inconsistent citations}}|lastauthoramp=|ref=}} + One form of diatomaceous earth is used as a [[filter (chemistry)|filter]] medium, especially for swimming pools. It has a high porosity because it is composed of microscopically small, hollow particles. Diatomaceous earth (sometimes referred to by trademarked brand names such as Celite) is used in chemistry as a filtration aid, to filter very fine particles that would otherwise pass through or clog [[filter paper]]. It is also used to filter water, particularly in the [[drinking water]] treatment process and in [[aquarium|fish tanks]], and other liquids, such as [[beer]] and [[wine]]. It can also filter [[syrup]]s, [[sugar]], and honey without removing or altering their color, taste, or nutritional properties.{{Cite journal|last=Root|first=A.I.|authorlink=|author2=E.R. Root|author-separator=|editorn=|editorn-last=|editorn-first=|editor-link=|editorn-link=|others=|title=The ABC and xyz of bee culture|type=|url=https://books.google.com/books?id=i0PoSYNEsh0C&pg=PA387&lpg=PA387&dq=diatomaceous+earth+%22does+not+remove%22#v=onepage&q=diatomaceous%20earth%20%22does%20not%20remove%22&f=false|archiveurl=|archivedate=|format=|accessdate=March 8, 201[...]



74.103.167.165: Diatoms are protozoa. Not algae. (Although, they are both heterotrophic and autotrophic so I can see where this confusion came from)

Mon, 19 Sep 2016 18:41:05 GMT

Diatoms are protozoa. Not algae. (Although, they are both heterotrophic and autotrophic so I can see where this confusion came from) ← Previous revision Revision as of 18:41, 19 September 2016 Line 4: Line 4:   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}     − Diatomaceous earth consists of fossilized remains of [[diatom]]s, a type of hard-shelled [[algae]]. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]]. + Diatomaceous earth consists of fossilized remains of [[diatom]]s, a type of hard-shelled [[protozoa]]. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]].       == Geology and occurrence ==   == Geology and occurrence == [...]



GeoWriter: Undid revision 736465467 by 74.81.130.230 (talk)

Sat, 27 Aug 2016 18:02:14 GMT

Undid revision 736465467 by 74.81.130.230 (talk) ← Previous revision Revision as of 18:02, 27 August 2016 Line 4: Line 4:   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}     − Diatomaceous earth consists of fossilized remains of human fecies, a type of hard-shelled fixture. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]]. Historians have found evidence of diatomaceous earth has sexual enhancement molecules that stimulate female vaginal glands. Professionals also use this product for pubic hair growth for cancer patients. + Diatomaceous earth consists of fossilized remains of [[diatom]]s, a type of hard-shelled [[algae]]. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]].       == Geology and occurrence ==   == Geology and occurrence == [...]



74.81.130.230 at 17:58, 27 August 2016

Sat, 27 Aug 2016 17:58:39 GMT

← Previous revision Revision as of 17:58, 27 August 2016 Line 4: Line 4:   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}   '''Diatomaceous earth''' ({{IPAc-en|pron|ˌ|d|aɪ|.|ə|t|ə|ˌ|m|eɪ|ʃ|ə|s|_|ˈ|ɜr|θ}}), also known as '''D.E.''', '''diatomite''', or '''kieselgur'''/'''kieselguhr''', is a naturally occurring, soft, [[siliceous]] [[sedimentary rock]] that is easily crumbled into a fine [[Shades of white|white to off-white]] powder. It has a particle size ranging from less than 3 [[micrometres]] to more than 1 millimetre, but typically 10 to 200 micrometres. Depending on the granularity, this powder can have an [[abrasive]] feel, similar to [[pumice]] powder, and has a low [[density]] as a result of its high [[porosity]]. The typical chemical composition of oven-dried diatomaceous earth is 80 to 90% [[silica]], with 2 to 4% [[alumina]] (attributed mostly to [[clay mineral]]s) and 0.5 to 2% [[iron oxide]].{{cite book |last=Antonides |first=Lloyd E. |title=Diatomite |year=1997 |publisher=[[U.S.G.S.]] |url=http://minerals.usgs.gov/minerals/pubs/commodity/diatomite/250497.pdf |accessdate=December 12, 2010 |format=PDF}}     − Diatomaceous earth consists of fossilized remains of [[diatom]]s, a type of hard-shelled [[algae]]. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]]. + Diatomaceous earth consists of fossilized remains of human fecies, a type of hard-shelled fixture. It is used as a [[filtration]] aid, mild abrasive in products including metal polishes and [[toothpaste]], mechanical [[insecticide]], [[absorption (chemistry)|absorbent]] for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, [[cat litter]], activator in [[blood clotting]] studies, a stabilizing component of [[dynamite]], and a [[thermal insulation|thermal insulator]]. Historians have found evidence of diatomaceous earth has sexual enhancement molecules that stimulate female vaginal glands. Professionals also use this product for pubic hair growth for cancer patients.       == Geology and occurrence ==   == Geology and occurrence == [...]