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Topic: Gypsum

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Calcium sulphate

Brimstone (sulfur)

Anhydrite

Chrysotile

Selenite

Plaster

Mineral

Fluorspar

Fluorite

Lime (mineral)

White Sands desert

Limonite

Baddeleyite

Water (molecule)

	Gypsum - Wikipedia, the free encyclopedia
		Gypsum is a very common mineral, with thick and extensive evaporite beds in association with sedimentary rocks.
		Gypsum is deposited in lake and sea water, as well as in hot springs, from volcanic vapors, and sulfate solutions in veins.
		Hydrothermal anhydrite in veins is commonly hydrated to gypsum by groundwater in near surface exposures.
	en.wikipedia.org /wiki/Gypsum (891 words)

	Gypsum, Colorado - Wikipedia, the free encyclopedia
		Gypsum is a town located in Eagle County, Colorado.
		Gypsum is home of the Eagle County Regional Airport (EGE), a popular regional airport used in the winter to transport skiiers to nearby Vail.
		Gypsum is on I-70 in western Eagle County.
	en.wikipedia.org /wiki/Gypsum,_Colorado (419 words)

	gypsum - Hutchinson encyclopedia article about gypsum
		Gypsum is used for making casts and moulds, and for flboard chalk.
		A fine-grained gypsum, called alabaster, is used for ornamental work.
		Roasted gypsum is known as plaster of Paris, because for a long time it was obtained from the gypsum quarries of the Montmartre district of Paris.
	encyclopedia.farlex.com /gypsum (163 words)

	City of Hopkins • Gypsum Wallboard
		Gypsum wallboard is not required throughout a dwelling however it is widely used as an interior finishing material.
		Gypsum wallboard is required on the garage side of the wall between the house and garage, in enclosed accessible space under stairs, on a wall of a building less than 3 feet from a property line, and for separations between dwelling units where two or more dwellings exist in the same building.
		Gypsum wallboard intended for interior use may not be used in areas exposed to the weather.
	www.hopkinsmn.com /inspections/building/gypsum.html (730 words)

	Gypsum Stacks (Site not responding. Last check: 2007-09-20)
		Phosphogypsum is calcium sulfate dihydrate (gypsum) produced by the reaction of phosphate rock with sulfuric acid during the process of producing phosphoric acid, the major ingredient of phosphate fertilizers.
		Gypsum is a common inorganic compound with many uses, but the term phosphogypsum is used to specify the particular gypsum by-product arising from the acidulation of phosphate rock.
		As the gypsum settles out, the excess transport water decants to collection ditches at the base of the stack and ultimately to the process cooling pond where it mingles with recycle process water from other areas of the plant to be available for recycle back to the plant.
	www.poly-flex.com /linerp02.html (2279 words)

	Gypsum (Site not responding. Last check: 2007-09-20)
		Gypsum is an all-natural soil conditioner that counters the damaging effects of salt, animal waste, salt damage and heavy clay.
		Gypsum is an excellent source of calcium, but it does not raise soil pH like limestone.
		The reasonable cost of gypsum is money well spent when you consider it's a good source of calcium and sulfur that all growing plants need, and it maximizes the effectiveness of your fertilizer and the effiiency of watering.
	www.yardright.com /gypsum.asp?avenue=lawncare.htm (365 words)

	Gypsum (Site not responding. Last check: 2007-09-20)
		Gypsum is one of the first minerals to crystallize when saltwater is evaporated.
		Gypsum is also used as a dietary supplement of sulfur for both humans and animals.
		Gypsum is also used as an accessory mineral under the microscope to test for the optic sign and interference figures of a mineral.
	s02.middlebury.edu /GL211A/STUDENTS/epeterma/gypsum.htm (281 words)

	Ultra Quiet Floors: Gypsum Underlayments
		Gypsum underlayments are often a key part of the floor system because this process adds critical elements to some UL-designed systems.
		Gypsum underlayments are used to level or flatten every kind of floor, including your problem floor areas.
		Gypsum underlayments are the most common choice as a thermal mass topping for thin slabs over wood floor construction.
	www.ultraquietfloors.com /gypsum_underlay.asp (351 words)

	Gypsum New Zealand - The soil amendment, conditioner and fertilizer
		Gypsum is particularly useful for treating heavy (clay) soils where it is used to improve the soil's texture, drainage and aeration.
		Gypsum also has applications in the remediation of soil that has been damaged through compaction (heavy stock, machinery), in the recovery of sub-soils exposed by earth movement (contouring, slippage) and in soils affected by salinity (estuarial berms, dairy effluent).
		Gypsum is also used extensively in the building industry (wallboards, cements, plasters etc) and in the manufacture of paper, food and beverages and pharmaceuticals.
	www.gypsum.co.nz (222 words)

	gypsum (Site not responding. Last check: 2007-09-20)
		Gypsum deposits lie in flat beds of about six to eight feet in thickness, and are often inter-layered with limestone or shale.
		Gypsum deposits were formed millions of years ago when salt water oceans covered most of the earth, and as they receded, may inland "dead" seas were formed which, as evaporation continued, became more and more salty.
		In the early days of gypsum mining, farmers drove their horses and wagons as far as 100 miles to purchase supplies of "land plaster" for use as fertilizer, or soil "sweetener" as it was called at the time.
	www.geo.msu.edu /geo333/gypsummining.html (2902 words)

	GYPSUM - Online Information article about GYPSUM
		Such gypsum when cut and polished has a pearly opalescence, or satiny sheen, whence it is called satin-spar (q.v.).
		character; hence the artificial dissolving of gypsum in water for brewing purposes is known as " burtonization." Deposits of gypsum are formed in boilers using selenitic water.
		In salt-lagoons the deposition of the gypsum is probably effected in most cases by means of micro-organisms.
	encyclopedia.jrank.org /GUI_HAN/GYPSUM.html (1408 words)

	A Brief History of Plaster
		Gypsum is a sedimentary rock, which settled through the evaporation of sea water trapped in lagoons.
		This contrasts with the use of gypsum over the last 200 years, when it was predominantly used for casting decorative elements and for gauging lime when running moldings, whilst most flat work has been executed using plain lime plasters.
		Although further investigation is required, it would appear that gypsum was being used in these early gypsum/lime plasters very differently from the way we expected and there is no evidence, at the moment, that it was also used for moldings or decorative work.
	www.artmolds.com /ali/history_plaster.html (643 words)

	SDNHM - Gypsum
		Gypsum is an evaporite, which means its crystals form during the evaporation of water.
		Gypsum can appear as transparent crystals (selenite); fibrous, elongated crystals (satin spar); granular and compact masses (alabaster); and in rosette-shaped aggregates called desert roses.
		Gypsum clusters, called desert roses, form in the desert from the evaporation of groundwater.
	www.sdnhm.org /fieldguide/minerals/gypsum.html (228 words)

	WBDG: 09200: Gypsum (Plaster) Board
		Gypsum is also produced as a by-product of several industrial and manufacturing processes, the most common of which is flue-gas desulphurization of fossil fuel powered electrical generating plants, sometimes referred to as "synthetic gypsum." Both forms of gypsum are chemically the same—calcium sulfate dihydrate (CaSO4·2H2O).
		Gypsum board is produced by combining calcined gypsum with water and other additives to form a slurry that is fed between continuous layers of paper on a board machine.
		Gypsum Association (GA)—Founded in 1930, GA promotes the use of gypsum while advancing the development, growth, and general welfare of the gypsum industry in the United States and Canada on behalf of its member companies.
	www.wbdg.org /design/09200.php?comment=1 (4574 words)

	Gypsum (Site not responding. Last check: 2007-09-20)
		Gypsum is a sulfate mineral, containing calcium and sulfur.
		Gypsum is one of the softest minerals, measuring 2 on the Mohs hardness scale.
		These are some of the samples of gypsum which are on display at the Smithsonian Museum of Natural History.
	hyperphysics.phy-astr.gsu.edu /hbase/geophys/gypsum.html (169 words)

	Loosen Clay Soil With Gypsum
		Gypsum may be just the answer to help break -up and loosen the soil structure.
		Here's where Gypsum may be just the answer for reconditioning the soil, because it can be applied on the surface soil in the vegetable garden, flowerbeds or on the lawn.
		Gypsum is neutral, non-toxic to humans and animals and does not burn.
	www.humeseeds.com /gypsum.htm (698 words)

	gypsum.htm (Site not responding. Last check: 2007-09-20)
		Description: Gypsum is a relatively common mineral in a number of environments.
		Gypsum nodules are also found in calcareous mudstones of the Scales Shale within the county.
		Sherrill (1978) finds that gypsum occurs with chert in dolostone at the base of the Alexandrian series near the contact with the Maquoketa Shale throughout the county.
	www.uwrf.edu /~wc01/gypsum.htm (584 words)

	Editorial (Site not responding. Last check: 2007-09-20)
		Gypsum is applied to the land to ensure that peanut plants receive enough calcium to develop normal kernels.
		Gypsum is used as a flux in the smelting of nickel ores.
		Gypsum is the coagulant in tofu, a soybean curd.
	www.science.uwaterloo.ca /earth/waton/f002.html (665 words)

	Naica, Mexico gypsum
		In a few, gypsum is the chief mineral and it is usually present in most of them.
		Of the gypsum caves the most remarkable are those of Naica, a small mining camp in the state of Chihuahua.
		It is the habit of the owners, the Naica Mines of Mexico, a subsidiary of the Penoles Company, to care for this cave and to prevent as far as possible the marring of its beauty by the promiscuous removal of crystals, a policy that should be respected by all visitors.
	www.minsocam.org /msa/collectors_corner/arc/naicagyp.htm (1147 words)

	Gypsum New Zealand - Home Gardening
		Gypsum is not harmful to children or pets and even when applied at very high levels it will not damage your soil or plants.
		Gypsum also raises the compost's nitrogen content, for, in the presence of gypsum, the ammonia released by bacteria converts to ammonium sulphate (a fertiliser) instead of being lost to the air.
		Gypsum can be applied to the soil in a greenhouse as with other areas of the garden.
	www.gypsum.co.nz /pages/product/homegardening.php (449 words)

	GYPSUM (Hydrated Calcium Sulfate)
		Gypsum is one of the more common minerals in sedimentary environments.
		Gypsum has several variety names that are widely used in the mineral trade.
		Gypsum has a very low thermal conductivity (hence it's use in drywall as an insulating filler).
	www.galleries.com /minerals/sulfates/gypsum/gypsum.htm (371 words)

	Gypsum for Agricultural Use in Ohio—Sources and Quality of Available Products
		Power plant gypsum in Ohio is permitted as a fertilizer material through the Ohio Environmental Protection Agency, and is monitored by the Ohio Department of Agriculture for Ca and S contents.
		Drywall gypsum contained 1% water at the recycling facility, whereas contents were as high as 19% after storage in the field.
		Gypsum from any of the sources examined could thus be applied without restriction for trace metal loading; however, samples from a given source should always be tested prior to application.
	ohioline.osu.edu /anr-fact/0020.html (1654 words)

	Gem, Rock, and Mineral Postage Stamps Featuring Gypsum (Site not responding. Last check: 2007-09-20)
		Desert rose is the name given to bladed gypsum crystals that are interlocked in a rose shape (desert rose also describes a similar arrangement of barite crystals).
		Solid masses of gypsum without discernable crystal structure are given the variety name alabaster.
		Gypsum is extremely soft and can be scratched with a fingernail.
	stampmin.home.att.net /gypsum.htm (222 words)

	Mineral Information Institute - GYPSUM (Site not responding. Last check: 2007-09-20)
		Gypsum belongs to a group of minerals called the sulfates, and is the most common of the approximately 150 sulfate minerals.
		Sedimentary gypsum is the gypsum that is mined as a commodity.
		Although mined gypsum will remain the primary source of this commodity for decades to come, about one-fourth of current gypsum production is provided as a by-product of some industrial processes.
	resourcescommittee.house.gov /subcommittees/emr/usgsweb/descriptions/descGypsum.html (525 words)

	The Mineral Gypsum
		The Uses of Gypsum Gypsum is one of the most widely used minerals in the world.
		Gypsum is also added to concrete to strengthen the material, so it can be used in concrete for roads, bridges and sidewalks just to name a few.
		Mining of Gypsum Because gypsum is often found in large thick layers near the Earth's surface, it is easily mined.
	www.emporia.edu /earthsci/amber/go336/bray (1225 words)

	Gypsum and Caliche in the Texas High Plains
		Gypsum is a salt - calcium sulfate - and when added to calcareous clay soils (the typical high calcium soil in Colorado), does no more than increase the already high calcium content.
		The only soil that can be benefitted by adding gypsum is a soil high in sodium, called "sodic soil" or "fl alkali." These soils normally are found where there is a high water table and poor drainage.
		In a sodic soil, the gypsum dissolves slowly, and some of the sodium ions on the soil are replaced by calcium ions.
	www.wtamu.edu /~crobinson/DrDirt/gypsum.html (847 words)

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