Gorgeyite

Gorgeyite
Mineralogical name	Gorgeyite, Görgeyite, Mikheevite
Chemical name
Trivial name
Chemical formula	K2Ca5(SO4)6•H2O
Other forms
Crystal system	monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³)	2.87 g/cm3
Molar volume	304 cm3/mol
Molar weight	872.98 g/mol
Transparency
Cleavage
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments
Crystal Optics
Refractive Indices	nx= 1.560 ny = 1.569 nz = 1.584
Birefringence	Δ = 0.024
Optical Orientation	positive
Pleochroism
Dispersion	79°
Used Literature
[Steiger.etal:2000]Author: Steiger, Michael; Beyer, Roland; Dorn, Joachim; Zeunert, Anke Booktitle: An Expert Chemical Model for Determining the Environmental Conditions Needed to Prevent Salt Damage in Porous Materials Editor: Price, Clifford A. Pages: 19-44 Publisher: Archetype Publications Ltd Title: Data compliation and experimantal determinations Year: 2000 [Dana:1951]Author: Dana J.D. Edition: 7 Editor: Dana E.S. Publisher: Wiley & Sons Title: Dana's System of Mineralogy Volume: 2 Year: 1951

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Literature

[Dana:1951]	Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons, %address%, %pages%, %url%, %doi%
[Steiger.etal:2000]	Steiger, Michael; Beyer, Roland; Dorn, Joachim; Zeunert, Anke (2000): Data compliation and experimantal determinations. In: Price, Clifford A. (eds.): An Expert Chemical Model for Determining the Environmental Conditions Needed to Prevent Salt Damage in Porous Materials, Archetype Publications Ltd, 19-44, %url%, %doi%