Tachyhydrite

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Tachyhydrite[1][2]
Mineralogical name Tachyhydrite
Chemical name Calciummagnesiumchloride dodecahydrate
Trivial name
Chemical formula CaMg2Cl6•12H2O
Other forms
Crystal system trigonal
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³) 1.667 g/cm3
Molar volume 309,9 cm3/mol
Molar weight 517,7 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments hygroscopic and deliquescent
Crystal Optics
Refractive Indices no= 1,520-1,522
ne = 1,512-1,513
Birefringence Δ = 0,008-0,009
Optical Orientation negative
Pleochroism
Dispersion
Used Literature
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