2024-03-19T12:50:34Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/171862020-03-17T08:33:50Zcom_10261_75com_10261_6col_10261_328
Gypsum, a Tricky Material
Herrero Isern, Juan
Artieda Cabello, Octavio
Hudnall, Wayne H.
This manuscript was approved for publication as manuscript # T-4-599 by the College of Agricultural and Natural Resources, Texas Tech University, Lubbock, TX.
The familiarity of mankind with gypsum and its simple composition are in contrast with the frequent mistakes reported for its behavior and role in nature. Gypsum has been studied as a raw material, as a rock constituent, as an indicator of geological and archaeological conditions, and from other points of view. However, its role in Earth surface processes, its relationship to life through calcium in the equilibrium of carbonates and its structural water molecules, seems overlooked. Moreover, errors of gypsum formulation, analysis, and behavior obscure some of its roles within nature. The semi-solubility of gypsum explains its actions in many soils. The softness, fragility, and crystal water of gypsum are often not considered. Routinely drying at 105°C and pulverizing samples for lab analyses casts suspicion on all analytical results because gypsum becomes anhydrite and/or bassanite at this temperature. Specific physicochemical models are needed to predict the behavior of soils mainly composed of gypsum.
This work was partially supported by funds of the Spanish Government: project AGL2006-01283, and grant PR2007-0453. Additional support was from a Texas USDA-NRCS grant 68-7442-6-752, and from the Department of Plant and Soil Science, Texas Tech University, Lubbock, TX.
Peer reviewed
2009-09-28T06:55:59Z
2009-09-28T06:55:59Z
2009-11
artículo
http://purl.org/coar/resource_type/c_6501
Soil Sci Soc Am J 73:1757-1763 (2009)
0361-5995
http://hdl.handle.net/10261/17186
10.2136/sssaj2008.0224
1435-0661
en
http://soil.scijournals.org/cgi/content/full/73/6/1757
open
47216 bytes
application/pdf
Soil Science Society of America