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'Gypsum' in keywords Facet   Publication Year 1990  [X]
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1990[X]
1Author    Rolf-Rüdiger Krüger, W. Alter, AbrielRequires cookie*
 Title    Über das Hochdruckverhalten von Gips On the Behaviour of Gypsum under High Pressure  
 Abstract    The decom position o f gypsum (dehydration) was studied in the pressure range 7 .5 -6 0 kbar and the temperature range 7 5 -4 0 0 °C using a belt type apparatus. Surprisingly, gypsum is rather stable even at pressures greater than 20 kbar contradicting the results o f a calculation o f the space requirement o f the competing phases (A I I -C a S 0 4 + H-,0; Hemihydrate + H20). Only when rising the temperature, as the most important thermodynamic variable for this reaction, the kinetically controlled decomposition starts. N o acceleration o f the dehydration process under shear stress (simple squeezer device) could be detected due to the limited (not geological) time. 
  Reference    Z. Naturforsch. 45b, 1221—1226 (1990); eingegangen am 27. Februar 1990 
  Published    1990 
  Keywords    Gypsum, Hydrates, High-Pressure, D ecom position 
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 TEI-XML for    default:Reihe_B/45/ZNB-1990-45b-1221.pdf 
 Identifier    ZNB-1990-45b-1221 
 Volume    45