Hydromagnesite

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Hydromagnesite<ref>http://webmineral.com/data/Hydromagnesite.shtml viewed on 09/07/2011</ref><ref>http://www.mindat.org/min-1979.html viewed on 09/06/2011</ref>
Mineralogical name Hydromagnesite
Chemical name Magnesium hydroxocarbonate
Trivial name
Chemical formula Mg5(OH)2(CO3)4•4H2O
Other forms
Crystal system monoclinic
Crystal structure
Deliquescence humidity 20°C
Solubility (g/l) at 20°C
Density (g/cm³) 2.236 g/cm3
Molar volume
Molar weight 467.5 g/mol
Transparency transparent
Cleavage perfect
Crystal habit
Twinning
Phase transition
Chemical behavior
Comments hardly soluble in water
Crystal Optics
Refractive Indices nx = 1.515-1.523
ny = 1.530-1.527
nz = 1.544-1.545
Birefringence Δ = 0.029-0.022
Optical Orientation biaxial positive
Pleochroism
Dispersion
Used Literature


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