Constituent Mg-Fe-silicate glass with olivine stoichiometry, Fe content 0.6 | SSHADE

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Constituent

Name: Mg-Fe-silicate glass with olivine stoichiometry, Fe content 0.6
Official name: Synthetic olivine group

Family: ionic solid
Class: mixed salt
Compound type: nesosilicate

Constituent abundance in material

Relevance: main - major
Arrangement: single phase
Mass fraction: 1.0
Mole fraction: 1.0

Chemical composition

Formula: (Mg $_{0.4}$ Fe $_{0.6}$ ) $_2$ SiO $_4$
Chemical formula: Mg0.8Fe1.2SiO4
Elemental formula: (Mg)0.8-2 Fe1.2 (Si)1-2 (O)4-8
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Mole fraction	Isotope mole fraction	State	Relevance
	$Mg$	Magnesium	element	0.8	0.1142857142857143	1.0	constituent element	main
	$Fe$	Iron	element	1.2	0.17142857142857143	1.0	constituent element	main
	$Si$	Silicon	element	1	0.14285714285714285	1.0	constituent element	main
	$O$	Oxygen	element	4	0.5714285714285714	1.0	constituent element	main

Chemical functions and bonds

Chemical bonds

	Bond	Number
	$\cdot Mg^{2+} \cdot O^{-}-$
	$\cdot Fe^{2+} \cdot O^{-}-$
	$\cdot (\cdot) Fe^{3+} \cdot O^{-}-$
	$\cdot Ni^{2+} \cdot O^{-}-$
	$\cdot Mn^{2+} \cdot O^{-}-$

Class: mixed salts (08)

Phase type: glassy

Crystallography

Crystal system: amorphous
Crystal class: N/A
Crystal class symbol: N/A
Crystal spacegroup: N/A
Comments: mostly orthorhombic system except 1 member. In Mindat the group also includes A=Ca^{2+}

Physical properties

Molar mass: 140.69-351.71 $g/mol$

Optical properties

Refringence type: biaxial