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gypsum
gypsum
gypsum evaporite mineral, CaSO
4.2H
2O; sp. gr. 2.3;
hardness 1.5–2;
monoclinic; clear white, but sometimes shades of yellow, grey, red, and brown; white
streak; vitreous
lustre;
crystals usually
tabular, often with curved faces, but can occur
massive or granular;
cleavage perfect {010}, good {100}, {011}; occurs in bedded deposits in association with
halite and
anhydrite. It is very insoluble and therefore the first mineral to precipitate from evaporating sea water; usually succeeded by anhydrite and halite. Occasionally it results from the reaction of sulphuric acid on
limestone in volcanic areas. It can also result from the secondary hydration of anhydrite. Selenite is the colourless, transparent form; satin spar is the fibrous variety; alabaster is the fine-grained variety and can be carved.
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Gypsum board vocabulary builder. (All Things Gypsum).(Brief Article)
Magazine article from: Walls & Ceilings; 9/1/2002; ; 700+ words
; Gypsum board is often called by such terms as drywall...specify and identify each of the different gypsum-based board and panel products. Knowledge about the correct term to use for a gypsum material may help you to avoid confusion...
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The Gypsum Products Market in North America - Market Environment, Supply and Demand, and Industry Structure.
Business Wire; 10/17/2007; 700+ words
; ...industry is now available to its catalogue. Gypsum Products in North America www.reportlinker...com/p060845/PRBW-North-America-Gypsum.html If you wish to get more information...Description This study examines the market for gypsum and gypsum products in North America...
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Gypsum board: provides environmental edge.(Studio)(gypsum board manufacturing industry)
Magazine article from: Environmental Design & Construction; 3/1/2004; ; 700+ words
; ...OMITTED] RECYCLED AND SYNTHETIC CONTENT The gypsum board manufacturing industry, for one...composition of the materials incorporated into a gypsum board area separation wall system. Sometimes...walls, or townhouse separation walls gypsum area separation walls are easy to erect...
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Gypsum sheathing: keys for an acceptable installation.(All Things Gypsum)
Magazine article from: Walls & Ceilings; 3/1/2004; ; 700+ words
; Paper-faced gypsum sheathing is a gypsum board that is used as a substrate for exterior claddings. It has a noncombustible core, composed essentially of gypsum and is faced with water-repellant paper on its back, front...
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Gypsum
Magazine article from: Mining Engineering; 6/1/1999; ; 700+ words
; The North American gypsum industry set records for gypsum board shipments during 1998, according to the Gypsum Association. Total wallboard shipments were about 2.83 Gm2 (30.5 billion sq ft). About 21.6 Mm2 (232 million sq ft) of wallboard...
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Gypsum: Annual review 1995
Magazine article from: Engineering and Mining Journal; 2/1/1997; ; 700+ words
; The United States continued to lead the world in gypsum production and in per capita consumption of gypsum wallboard in 1995. Also during the year, the holdings of several U.S. gypsum producers changed significantly as acquisitions further...
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Gypsum Synthesis.(Brief Article)
Magazine article from: Walls & Ceilings; 10/1/2001; ; 700+ words
; ...industry to water- and moisture-resistant gypsum wallboard (used typically as a substrate...environmental or green benefits, synthetic gypsum--created as a byproduct of the electric...green board. New heights The mineral rock gypsum (calcium sulfate) has been used as a...
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Reportlinker Adds Gypsum Products in North America.
Business Wire; 9/21/2009; 700+ words
; ...available in its catalogue. Reportlinker Adds Gypsum Products in North America http://www...com/p0148879/Reportlinker-Adds-Gypsum-Products-in-North-America.html North American gypsum demand to benefit from recovery in US housing...
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GYPSUM
Magazine article from: Mining Engineering; 6/1/2004; ; 700+ words
; Gypsum wallboard manufacturers in the United States...Following a historic high production of gypsum wallboard products in 1999, production...a relatively quiet year. The amount of gypsum consumed in the United States during 2003...
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Analysis of Gypsum Market in Poland.
M2 Presswire; 1/3/2003; 700+ words
; ...January 2003-Research and Markets Ltd: Analysis of Gypsum Market in Poland(C)1994-2003 M2 COMMUNICATIONS LTD RDATE:01012003 Chapter 1. Use of gypsum within gypsum market. Size of gypsum market in Poland 5 Demand for...
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Gypsum
Book article from: World of Earth Science
Gypsum Gypsum, a white mineral soft enough to be scratched with a fingernail, is hydrated calcium sulfate [Ca(SO 4 ) 2H 2 O]. Gypsum often begins as calcium sulfate dissolved in an isolated body of salt water...
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National Gypsum Company
Book article from: International Directory of Company Histories
National Gypsum Company 2001 Rexford Road Charlotte, North Carolina 28211 U...Sales: $511.1 million Stock Exchanges: NASDAQ SICs: 3275 Gypsum Products The National Gypsum Company, the second largest producer and supplier of gypsum...
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SIC 3275 Gypsum Products
Encyclopedia entry from: Encyclopedia of American Industries
SIC 3275 GYPSUM PRODUCTS Companies predominately employed in manufacturing plaster, plasterboard, and other gypsum products constitute the gypsum products industry. The manufacturers in this industry make...
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gypsum
Book article from: The Columbia Encyclopedia, Sixth Edition
gypsum , mineral composed of calcium sulfate...crystalline variety is selenite. A massive gypsum of delicate color and texture, readily...like, is called alabaster. A lustrous gypsum with fibrous structure, called satin spar...
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Drywall
Book article from: How Products Are Made
...construction material consisting of thin panels of gypsum board. The board is composed of a layer of gypsum rock sandwiched between two layers of special...earlier technique of applying wet plaster to a gypsum lath. In addition to being easy to install...
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