GYPSUM

jĭpˈsəm, mineral composed of calcium sulfate (calcium, sulfur, and oxygen) with two molecules of water, CaSO4·2H2O. It is the most common sulfate mineral, occurring in many places in a variety of forms. A transparent crystalline variety is selenite. A massive gypsum of delicate color and texture, readily worked into ornamental vases, boxes, and the like, is called alabaster. A lustrous gypsum with fibrous structure, called satin spar, is used in jewelry and for other ornaments, but it is soft and easily marred. Plaster of Paris, a fine white powder, is produced by heating gypsum to expel the water. If this powder is moistened and then allowed to dry, it becomes hard, or sets. Its major use is in the manufacture of gypsum lath and wall board, and for casts and molds. It is widely used for staff, the material of which temporary exposition buildings are made. Uncalcined gypsum is added to Portland cement as a retarder.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Gypsum
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books on: Gypsum  - 1558 results

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1.
Wildcat Strike
Book by Alvin W. Gouldner; Antioch Press, 1954
Subjects: Industrial Relations, Strikes And Lockouts, Wildcat Strikes
...Preface THIS IS THE SECOND REPORT on our gypsum studies and is, as such, the companion...men and the management of the "General Gypsum Company," even during the travail of the...plant owned and operated by the General Gypsum Company. 1 The following account seeks...
2.
Descriptive Palaeoclimatology
Book by A. E. M. Nairn; Interscience Publishers, 1961
Subjects: Paleoclimatology
...water. Evaporite basins form in arms of the sea where circulation of sea water is impeded, which leads to the precipitation of gypsum, anhydrite, halite and potassium salts. Optimum conditions for the evaporation of sea water prevail in an arid climate where...
3.
Economic Consequences of Divided India: A Study of the Economy of India and Pakistan
Book by C. N. Vakil; Vora, 1950
Subjects: India--Economic Conditions--1945-, Pakistan--Economic Conditions
...IV. Chromite. V. Bauxite. VI. Gypsum. VII. Sulphur...minerals like titanium, thorium, beryl, gypsum, bauxite, magnesite, silica, granite...to meet most of their requirements of gypsum, salt, antimony and sulphur from Pakistan...
4.
The Colorado Plateau: A Geologic History
Book by Donald L. Baars; University of New Mexico Press, 1983
Subjects: Geology--Colorado Plateau
...some outcrops. It also contains beds of gypsum in the region west of the canyon, which...Colorado River occur at the mouth of Gypsum Canyon, named because of a thick sequence of bedded gypsum exposed by erosion in the lower three hundred...
5.
Georges Cuvier, Fossil Bones, and Geological Catastrophes: New Translations & Interpretations of the Primary Texts
Book by M. J. S. Rudwick, George Cuvier; University of Chicago Press, 1997
Subjects: Catastrophes (Geology), Geology--History--18th Century, Mammals, Fossil
...6. The Animals from the Gypsum Beds around Paris 59...alteration of chalk into flint and that of gypsum into chalcedony. Has Wiedemann in his...fossils that were being found in the gypsum quarries just outside Paris itself. The...
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journal articles on: Gypsum  - 319 results

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1.
Mold Growth on Gypsum Wallboard-A Summary of Three Techniques
Journal article by M.Y. Menetrez, K.K. Foarde, T.D. Webber, T.R. Dean, D.A. Betancourt; Journal of Environmental Health, Vol. 72, 2009
Subjects: Gypsum building materials--Contamination, Molds (Fungi)--Growth, Molds (Fungi)--Health aspects
Mold Growth on Gypsum Wallboard-A Summary of Three Techniques...wood or paper products (e.g., insulation, gypsum wallboard GWB, or ceiling tile). The spores...addressing the control of mold contamination in gypsum wallboard have been chosen to summarize...
2.
Turning Wallboard out to Pasture
Journal article by Carol Potera; Environmental Health Perspectives, Vol. 108, 2000
...000-square-foot house leaves about a ton of gypsum wallboard waste from end cuts, window...the United States, three million tons of gypsum wallboard waste is dumped in landfills...space, microbial action can decompose gypsum to malodorous hydrogen sulfide gas, which...
3.
Antitrust Violations
Journal article by Candice Jones, David S. Lee, Adrian Shin; American Criminal Law Review, Vol. 38, 2001
Subjects: Antitrust law--Surveys
...Intent In United States v. United States Gypsum Co.,(69) the Supreme Court held that proof...will not suffice.(72) In United States Gypsum Co., a criminal prosecution of an information...applied rule of reason analysis.(74) The Gypsum Court held that intent may not be presumed...
4.
Antitrust Violations
Journal article by Christopher M. Brown, Nikhil S. Singhvi; American Criminal Law Review, Vol. 35, 1998
Subjects: Antitrust law--Surveys
...Intent In United States v. United States Gypsum Co.,(49) the Supreme Court considered...will not suffice.(52) United States Gypsum Co. involved an exchange of price information...instructions that explain the United States Gypsum Co. knowledge standard for proving intent...
5.
Antitrust
Journal article by Alec Koch, Carrie B. Mahan, John Woykovsky; American Criminal Law Review, Vol. 33, 1996
Subjects: Antitrust law--Criminal provisions, Restraint of trade--Laws, regulations, etc., Sherman Act
...Intent In United States v. United States Gypsum Co.,(47) the Supreme Court held that an...is insufficient.(50) United States Gypsum involved an exchange of price information...instructions that explain the United States Gypsum knowledge standard for proving intent...
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magazine articles on: Gypsum  - 120 results

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1.
National Gypsum: Building Safe Performance
Magazine article by Sandy Smith; Occupational Hazards, Vol. 65, September 2003
Subjects: Building materials industry--Management, Building materials industry--Safety and security measures, Industrial management--Safety and security measures, National Gypsum Co.--Management, National Gypsum Co.--Safety and security measures, Occupational safety and health--Analysis, Occupational safety and health--Management
National Gypsum: Building Safe Performance. by Sandy Smith National Gypsum manufactures gypsum wallboard, interior finishing products for wallboard and cement board. In addition, it operates its own quarries. In total, the company...
2.
Not Just a Hole in the Ground
Magazine article by Trevor D. Ford; World and I, Vol. 15, December 2000
Subjects: Caves--Discovery and exploration
...Trevor D. Ford Carved out of limestone, gypsum, lava, or ice, cave systems are amazking places...miles. Caves can also be formed in strata of gypsum (calcium sulfate), a soluble mineral. Gypsum is weaker than limestone and more liable to...
3.
A Desert Galápagos
Magazine article by William Conrod; Natural History, Vol. 117, May 2008
Subjects: Colleges & universities, Color, Memorials & monuments, White Sands National Monument, Whites
...I was standing on the worlds largest gypsum dune field, at White Sands National Monument...coloration, they can improve concealment on the gypsum dunes and thereby improve their chances...stroll from a park road in New Mexico. Gypsum is the stuff of plaster and drywall: a...
4.
Green Revolution in the Making
Magazine article by Curtis Moore; Sierra, Vol. 80, January 1995
Subjects: Corporations, German--Environmental policy, Environmental protection--Germany, Germany--Environmental policy, Green marketing--Germany
...elbow, a constant stream of cream-colored gypsum paste squirts between the kraft sheets...subsidiary of its U.S. developer and Knauf Gypsum. Rapidly improved there in response to...in 1993. The production of marekt-grade gypsum was "a fundamental requirement" contained...
5.
Is the Press Any Match for Powerhouse P.R
Magazine article by Alicia Mundy; Columbia Journalism Review, Vol. 31, September 1992
Subjects: Hill and Knowlton Inc.--Moral and ethical aspects, Public relations--Moral and ethical aspects
...in it is timeless. Representing U.S. Gypsum, which for years had used asbestos in some products, H K advised Gypsum that "the spread of media coverage must...to the safety of asbestos. Although a Gypsum spokesman told The Daily Record that...
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newspaper articles on: Gypsum  - 210 results

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1.
Earnings
Newspaper article; Daily Herald (Arlington Heights, IL), April 26, 2002
Subjects: Boating industry, Brunswick Corp., Building materials industry, Concretes, Gypsum, Plaster, USG Corp.
...operations during the first quarter," said USG President and CEO William C. Foote in a press release. USG, a Chicago-based maker of gypsum wallboard and other building materials, said improved market conditions, with a strong housing market and increased residential...
2.
Protect Soil against Salt Damage
Newspaper article; The Washington Times, September 12, 2007
...There is help, in the form of pelletized gypsum. This is a common soil amendment available...Washington area gardens. I began reading up on gypsum when my brother on Long Island, a horticulturist...planting instruction to amend the soil with gypsum to counteract salt in the ground from...
3.
Rock, Wall, Art Campton Township Artist Uses Earthy Materials to Make Neo-Aboriginal Works
Newspaper article; Daily Herald (Arlington Heights, IL), February 17, 2006
...wee hours of the morning. She mixes wet gypsum, and uses tools she has designed to carve...accurately." Eventually she discovered gypsum - a mineral used in plaster and drywall...delighted with the effect," Vovola said. Using gypsum as her canvas, the images took on a stunning...
4.
Wall-to-Wall Sustainability Ups Green Credentials
Newspaper article; The Birmingham Post (England), March 13, 2008
Subjects: Building materials industry--Alliances and partnerships, Environmental sustainability, Refuse and refuse disposal, Refuse disposal industry--Alliances and partnerships, Waste management, Waste management industry--Alliances and partnerships
...into building products. The Fermacell gypsum-based dry wall partitioning manufacturer...specialising in the recycling of Fermacell and gypsum wastes. The partnership provides customers with an on-site facility to segregate gypsum waste, collect the materials in bags...
5.
Real Estate Transfers
Newspaper article; Daily Herald (Arlington Heights, IL), April 17, 2000
...recently in DuPage and Will counties: Naperville $173,008; 2853 Gypsum Circle, 60564; sold Feb. 16 by 1st Midwest Trust to Grant Matthews...10 by Amy T. Cole to Joanne F. DeNicholas. $147,393; 2883 Gypsum Circle, 60564; sold Feb. 9 by First Midwest Trust to Thomas...
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encyclopedia articles on: Gypsum  - 68 results

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1.
Gypsum
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
GYPSUM jip s m, mineral composed of calcium sulfate (calcium...transparent crystalline variety is selenite. A massive gypsum of delicate color and texture, readily worked into ornamental...vases, boxes, and the like, is called alabaster. A lustrous gypsum with fibrous structure, called satin spar, is used in jewelry...
2.
Alabaster
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...fine-grained, massive, translucent variety of gypsum , a hydrous calcium sulfate. It is pure...brown. Alabaster, like all other forms of gypsum, forms by the evaporation of bedded deposits...marble , a calcium carbonate; whereas gypsum is a calcium sulfate. Important sources...
3.
Hardness
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
...minerals in order of hardness: talc, 1; gypsum, 2; calcite, 3; fluorite, 4; apatite...10. The listing indicates merely that gypsum (hardness=2) is harder than i.e., capable...1). The listing does not indicate that gypsum (2) is twice as hard as talc (1). The...
4.
Satin Spar
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
SATIN SPAR see calcite ; gypsum . ____________________ Copyright 2009 Columbia University Press. Used with the permission of Columbia University Press. All rights reserved.
5.
Plaster of Paris
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
PLASTER OF PARIS see gypsum . ____________________ Copyright 2009 Columbia University Press. Used with the permission of Columbia University Press. All rights reserved.
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