Constituent
Name
Clinopyroxenes
Class
silicate mineral
Compound type
inosilicate
Relevance
impurity
Arrangement
complex intimate mix
Mass fraction
0.044 $\pm$ 0.04
Abundance comments
Mostly Augite - Mass fraction uncertain (0.044 for < 2µm size - Vogt 2002)
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
(V)0-1 (Fe2+)0-1 (Cr)0-1 (Sc)0-1 (Mn2+)0-0.5 Si2 (Na)0-1 (Zn)0-1 (Al)0-1 (Ca)0-1 O6 (Ti)0-1 (Mg)0-1
Isotope mixture type
terrestrial abundance
  Formula Name Family Number min-max Isotope mole fraction State Relevance
$Ca$ Calcium element 0 - 1 constituent element main
$Fe^{2+}$ Iron(II) cation element 0 - 1 constituent element main
$Si$ Silicon element 2 constituent element main
$Cr$ Chromium element 0 - 1 constituent element main
$Mg$ Magnesium element 0 - 1 constituent element main
$Sc$ Scandium element 0 - 1 constituent element main
$Zn$ Zinc element 0 - 1 constituent element main
$Mn^{2+}$ Manganese(II) cation element 0 - 0.5 constituent element main
$Al$ Aluminium element 0 - 1 constituent element main
$Na$ Sodium element 0 - 1 constituent element main
$O$ Oxygen element 6 constituent element main
$Ti$ Titanium element 0 - 1 constituent element main
$V$ Vanadium element 0 - 1 constituent element main
Oxides
Formula $Al_{2}O_{3}$ $Cr_{2}O_{3}$ $TiO_{2}$ $Sc_{2}O_{3}$ $Fe_{2}O_{3}$ $FeO$ $SiO_{2}$ $ZnO$ $Na_{2}O$ $CaO$ $MnO$ $V_{2}O_{5}$ $MgO$
Mass fraction (%)

Strunz

Class
silicates (09)
Division
inosilicate (09.D)
Family
Inosilicates 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
Crystal system
various
Crystal class
various
Crystal class symbol
various
Crystal spacegroup
various
Refringence type
various
Refringence sign
positif or negatif
Color
various
Diaphaneity
transparent to opaque
Luster
various