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
{{{Literature}}}

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Literature

[Dana:1951]	Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons
[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.

[Dana:1951]

Dana E.S. (eds.) Dana J.D. (1951): Dana's System of Mineralogy, 7, Wiley & Sons

A phase is a physically distinctive form of matter and is characterized by having relatively uniform chemical and physical properties.