Constituent Mg-rich serpentine phyllosilicates | SSHADE

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Constituent

Name: Mg-rich serpentine phyllosilicates
IMA name: Serpentines group

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

Constituent abundance in material

Relevance: main - major
Arrangement: unknown
Mass fraction: 1.0

Chemical composition

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	Isotope mole fraction	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

Composition comments: Common impurities: Cr, Ti, Ca, Na, K, F, H2O

Chemical functions and bonds

Chemical functions

	Function	Number
	$(OH)^-$	4

Chemical bonds

	Bond	Number
	$O^--H$	1

Oxides composition

Oxides

Formula	$FeO$	$Fe_{2}O_{3}$	$MnO$	$MgO$	$Al_{2}O_{3}$	$ZnO$	$NiO$	$Li_{2}O$	$SiO_{2}$	$H_{2}O$
Mass fraction (%)

Classifications

Strunz

Class: silicates (09)
Division: phyllosilicate (09.E)
Family: with kaolinite layers composed of tetrahedral and octahedral nets (09.ED)
Code: 09.ED.15

Dana

Major class: silicates (VIII)
Class: phyllosilicate sheets of six-membered rings (71)
Type: with 1:1 layers (71.01)
Group: Serpentine group (71.01.02)

Phase type: crystalline

Crystallography

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

Physical properties

Molar mass: 255.91 - 399.50 $g/mol$
Density: 2.5 - 3.84 $g/cm^3$

Optical properties

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