Constituent Goldichite | SSHADE

Processing math: 47%

Constituent

Name: Goldichite
IMA name: Goldichite

Class: non-silicate mineral
Compound type: sulfate

Constituent abundance in material

Relevance: main - minor
Arrangement: in multi-phases
Mass fraction: 0.1 $\pm$ 0.1

Chemical composition

Formula: $KFe^{3+}(SO_4)_2 \bullet 4(H_2O)$
Chemical formula: K(Fe3+)(SO4)2•4(H2O)
Elemental formula: (K+) (Fe3+) S2 O8 (O-)4 H8
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$K^+$	Potassium(1+) cation	element	1		constituent cation	main
	$Fe^{3+}$	Iron(III) cation	element	1		constituent cation	main
	$(SO_4)^{2-}$	Sulfate anion	chemical function	2		anionic radical	main
	$H_2O$	Water	molecule	4		hydration	main

Chemical functions and bonds

Chemical functions

	Function	Number	Relevance
	$(SO_4)^{2-}$	2
	$R-OH$	2	main

Chemical bonds

	Bond	Number	Relevance
	$-O-H$	2	main
	$\dddot - \dddot - \dddot - S \dddot - O^{-1/2}$	4

Oxides composition

Oxides

Formula	$K_{2}O$	$Fe_{2}O_{3}$	$H_{2}O$	$SO_{3}$
Mass fraction (%)	13.11	22.23	20.07	44.59

Classifications

Strunz

Class: sulfates - chromates - molybdates - tungstates (07)
Division: sulfates (selenates, etc.) without additional anions, with H2O (07.C)
Family: with medium-sized and large cations (07.CC)
Code: 07.CC.40

Dana

Major class: sulfates, chromates, selenates (VI)
Class: hydrated acid and sulfates (29)
Type: where AB(XO4)2.x(H2O) (29.05)
Group: -Goldichite- group (29.05.02)
Code: 29.05.02.01

Phase type: crystalline

Crystallography

Crystal system: monoclinic
Crystal class: prismatic
Crystal class symbol: 2/m (C2h)
Crystal spacegroup: P2(1)/c

Physical properties

Molar mass: 359.13 $g/mol$
Density: 2.43 $g/cm^3$

Optical properties

Refringence type: biaxial
Refringence sign: positive
Birefringence: 0.0470
Refraction index $n_{\alpha}$: 1.582
Refraction index $n_{\beta}$: 1.602
Refraction index $n_{\gamma}$: 1.629
Color: light yellow green