Solid phase
Official name
Synthetic pyroxenes group
Type
Family
covalent network solid
Class
chain covalent network solid
Compound type
inosilicate
Chemical composition
Formula
$AB.[(Si,Al)O_3]_2\ \ \ \ \ $ where $A = Ca, Na, Fe^{2+}$, and/or $Mg$, and sometimes $Zn, Mn^{2+}, Li\ \ \ $ and $B = Al, Fe^{3+}, Mg, Mn^{3+}, Cr, Sc, Ti, V^{3+}$ and/or $Fe^{2+}$
Chemical formula
(Ca,Na,Fe2+,Mg,Zn,Mn2+,Li)(Al,Fe3+,Mg,Mn3+,Cr,Ti,Sc,V3+,Fe2+)(Si,Al)2O6
Elemental formula
(Ca)0-1 (Na)0-1 (Mg)0-2 (Fe2+)0-2 (Fe3+)0-1 (Mn2+)0-1 (Mn3+)0-1 (Al)0-1 (Zn)0-1 (Li)0-1 (Cr3+)0-1 (Ti)0-0.5 (V3+)0-1 (Sc)0-1 (Si)1-2 O6
Isotope mixture type
terrestrial abundance
30.5
  Formula Name Family Number min-max Mole fraction Isotope mole fraction State Relevance
$Ca$ Calcium element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Na$ Sodium element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Mg$ Magnesium element 0 - 2 0.06557377049180328 $\pm$ 0.06557377049180328 1 constituent element main
$Fe^{2+}$ Iron(II) cation element 0 - 2 0.06557377049180328 $\pm$ 0.06557377049180328 1 constituent element main
$Fe^{3+}$ Iron(III) cation element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Mn^{2+}$ Manganese(II) cation element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Mn^{3+}$ Manganese(III) cation element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Al$ Aluminium element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Zn$ Zinc element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Li$ Lithium element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Cr^{3+}$ Chromium(III) cation element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Ti$ Titanium element 0 - 0.5 0.01639344262295082 $\pm$ 0.01639344262295082 1 constituent element main
$V^{3+}$ Vanadium(III) cation element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Sc$ Scandium element 0 - 1 0.03278688524590164 $\pm$ 0.03278688524590164 1 constituent element main
$Si$ Silicon element 1 - 2 0.09836065573770492 $\pm$ 0.03278688524590164 1 constituent element main
$O$ Oxygen element 6 0.39344262295081966 1 constituent element main
Class
chain covalent networks (09)
Equivalent mineral
Pyroxene group
Phase type
crystalline
Crystal system
various
Crystal class
various
Crystal class symbol
various
Crystal spacegroup
various
Molar mass
186.09 - 248.09 $g/mol$
Density
3.1-4.07 $g/cm^3$
State NTP
solid
Refringence type
biaxial
Refringence sign
positive or negative
Pure color
various
Links