Constituent pyroxene | SSHADE

Constituent

Name: pyroxene
IMA name: Clinopyroxenes subgroup

Class: silicate mineral
Compound type: inosilicate

Constituent abundance in material

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

Chemical composition

Formula: $AB.[SiO_3]_2$ with $A = Na, Ca, Fe^{2+}, Mn^{2+}$ and/or $Mg$ , and $B = Fe^{2+}, Mn^{2+}, Mg, Al, Zn, Ti, Cr, V$ and/or $Sc$ )
Chemical formula: (Na,Ca,Fe2+,Mn2+,Mg)(Fe2+,Mn2+,Mg,Al,Zn,Ti,Cr,V,Sc)Si2O6
Elemental formula: (Na)0-1 (Ca)0-1 (Fe2+)0-1 (Mn2+)0-0.5 (Mg)0-1 (Al)0-1 (Zn)0-1 (Ti)0-1 (Cr)0-1 (V)0-1 (Sc)0-1 Si2 O6
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Na$	Sodium	element	0 - 1		constituent element	main
	$Ca$	Calcium	element	0 - 1		constituent element	main
	$Fe^{2+}$	Iron(II) cation	element	0 - 1		constituent element	main
	$Mn^{2+}$	Manganese(II) cation	element	0 - 0.5		constituent element	main
	$Mg$	Magnesium	element	0 - 1		constituent element	main
	$Al$	Aluminium	element	0 - 1		constituent element	main
	$Zn$	Zinc	element	0 - 1		constituent element	main
	$Ti$	Titanium	element	0 - 1		constituent element	main
	$Cr$	Chromium	element	0 - 1		constituent element	main
	$V$	Vanadium	element	0 - 1		constituent element	main
	$Sc$	Scandium	element	0 - 1		constituent element	main
	$Si$	Silicon	element	2		constituent element	main
	$O$	Oxygen	element	6		constituent element	main

Composition comments: Common impurities: $K, Co, Ni

Oxides composition

Oxides

Formula	$Na_{2}O$	$CaO$	$FeO$	$MnO$	$MgO$	$Fe_{2}O_{3}$	$Al_{2}O_{3}$	$ZnO$	$TiO_{2}$	$Cr_{2}O_{3}$	$V_{2}O_{5}$	$Sc_{2}O_{3}$	$SiO_{2}$
Mass fraction (%)

Classifications

Strunz

Class: silicates (09)
Division: inosilicate (09.D)
Family: with 2-periodic single chains, Si2O6; pyroxene family (09.DA)

Dana

Major class: silicates (VIII)
Class: inosilicate single-width unbranched chains, w=1 (65)
Type: with chains P=2 (65.01)
Group: N/A (N/A)

Phase type: crystalline

Crystallography

Crystal system: various
Crystal class: various
Crystal class symbol: various
Crystal spacegroup: various

Optical properties

Refringence type: various
Refringence sign: positive or negative
Color: various
Diaphaneity: transparent to opaque
Luster: various