Bischofite | SSHADE

Processing math: 100%

Mineral phase

IMA name: Bischofite

Class: non-silicate mineral
Compound type: halide

Chemical composition

Formula: $MgCl_2 \bullet 6(H_2O)$
Chemical formula: MgCl2.6(H2O)
Elemental formula: Mg Cl2 O6 H12
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Mg$	Magnesium	element	1		constituent element	main
	$Cl$	Chlorine	element	2		constituent element	main
	$O$	Oxygen	element	6		constituent element	main
	$H$	Hydrogen	element	12		constituent element	main

Composition comments: common impurities: Ca, $SO_3$ - Deliquescent: 33.5% (10°C), 33.1% (20°C), 32.4% (30°C)

Oxides composition

Oxides

Formula	$MgO$	$H_{2}O$	$Cl$
Mass fraction (%)	19.82	53.17	34.88

Classifications

Strunz

Class: halides (03)
Division: simple halides, with H2O (03.B)
Family: M:X = 1:2 (03.BB)
Code: 03.BB.15

Dana

Major class: halides (IV)
Class: anhydrous and hydrated halides (09)
Type: where A(X)2 (09.02)
Group: Bischofite group (09.02.09)
Code: 09.02.09.01

Crystallography

Phase type: crystalline
Crystal system: monoclinic
Crystal class: prismatic
Crystal class symbol: 2/m (C2h)
Crystal spacegroup: C2/m

Physical properties

Molar mass: 203.30 $g/mol$
Density: 1.56 $g/cm^3$

Thermodynamical properties

State NTP: solid

Optical properties

Refringence type: biaxial
Refringence sign: positive
Birefringence: 0.0330
Refraction index $n_{\alpha}$: 1.495
Refraction index $n_{\beta}$: 1.507
Refraction index $n_{\gamma}$: 1.528
Dispersion V: r > v, weak
Pure color: colorless
Color: colorless, white
Diaphaneity: transparent to translucent
Luster: vitreous

Links and Publications

Links