Serpentines group

Mineral phase

Class: silicate mineral
Compound type: phyllosilicate
Comments: Other Sepentine subgroup: Amesite - exception: Kellyte has uniaxial refringence

Formula: $D_{2-3}.(Si,Al,Fe^{3+})_2O_5(OH)_4 \ \ \ \ \ $ where $D = Fe^{2+}, Fe^{3+}, Mn^{2+}, Mg, Al, Zn, Ni,$ and/or $Li$
Chemical formula: (Fe2+,Fe3+,Mn2+,Mg,Al,Zn,Ni,Li)2-3(Si,Al,Fe3+)2O5(OH)4
Elemental formula: (Fe2+)0-3 (Fe3+)0-2 (Mn2+)0-3 (Mg)0-3 (Al)0-3 (Zn)0-3 (Ni)0-3 (Li)0-1 (Si)1-2 O9 H4
Isotope mixture type: terrestrial abundance

Formula	Name	Family	Number min-max	State	Relevance
$Fe^{2+}$	Iron(II) cation	element	0 - 3	constituent element	main
$Fe^{3+}$	Iron(III) cation	element	0 - 2	constituent element	main
$Mn^{2+}$	Manganese(II) cation	element	0 - 3	constituent element	main
$Mg$	Magnesium	element	0 - 3	constituent element	main
$Al$	Aluminium	element	0 - 3	constituent element	main
$Zn$	Zinc	element	0 - 3	constituent element	main
$Ni$	Nickel	element	0 - 3	constituent element	main
$Li$	Lithium	element	0 - 1	constituent element	main
$Si$	Silicon	element	1 - 2	constituent element	main
$O$	Oxygen	element	9	constituent element	main
$H$	Hydrogen	element	4	constituent element	main