Constituent Chlorites | SSHADE

Constituent

Name: Chlorites
IMA name: Chlorites group

Class: silicate mineral
Compound type: phyllosilicate
Comments: from Vogt et al. (2002)
Group endmembers are: Donbassite, Cookeite, Sudoite, Clinochlore, Nimite, Baileychlore, Chamosite, Pennantite, Orthochamosite and Borocookeite - Crystal system: Monoclinic 2/m; with some triclinic polymorphs

Constituent abundance in material

Relevance: main - major
Arrangement: single phase
Mass fraction: 1.0 $\pm$ 0.001

Chemical composition

Formula: $A_{5-6}T_4Z_{18}\ \ \ \ \$ where $A = Al, Fe^{2+}, Fe^{3+}, Li, Mg, Mn$ , and/or $Ni$ , $\ \ \ T = Al, Fe^{3+}, Si,\ \ \$ and $Z = O$ and $OH$
Chemical formula: (Al,Fe2+,Fe3+,Li,Mg,Mn,Ni,[])6(Al,Fe3+,Si)4(O,OH)18
Elemental formula: (Al)2-5.33 (Fe2+)0-3 (Fe3+)0-0.5 (Li)0-2 (Mg)1-4 (Mn)0-1 (Ni)0-3 (Si)3-4 O18 (H)6-8
Isotope mixture type: terrestrial abundance

	Formula	Name	Family	Number min-max	Isotope mole fraction	State	Relevance
	$Al$	Aluminium	element	2 - 5.33		constituent element	main
	$Fe^{2+}$	Iron(II) cation	element	0 - 3		constituent element	main
	$Fe^{3+}$	Iron(III) cation	element	0 - 0.5		constituent element	main
	$Li$	Lithium	element	0 - 2		constituent element	main
	$Mg$	Magnesium	element	1 - 4		constituent element	main
	$Mn$	Manganese	element	0 - 1		constituent element	main
	$Ni$	Nickel	element	0 - 3		constituent element	main
	$Si$	Silicon	element	3 - 4		constituent element	main
	$O$	Oxygen	element	18		constituent element	main
	$H$	Hydrogen	element	6 - 8		constituent element	main

Composition comments: Common Impurities: Cr, Co, Ti, Ca, Na, K, C, P, S, H2O, ORG

Chemical functions and bonds

Chemical functions

	Function	Number
	$(OH)^-$

Chemical bonds

	Bond	Number
	$O^--H$	1

Oxides composition

Oxides

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

Classifications

Strunz

Class: silicates (09)
Division: phyllosilicate (09.E)
Family: with mica sheets, composed of tetrahedral and octahedral nets (09.EC)
Code: 09.EC.55

Dana

Major class: silicates (VIII)
Class: phyllosilicate sheets of six-membered rings (71)
Type: interlayered 1:1, 2:1, and octahedra (71.04)
Group: Chlorite group (Tri-Dioctahedral) (71.04.01)

Phase type: crystalline

Crystallography

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

Physical properties

Molar mass: 502.73 - 709.44 $g/mol$
Density: 2.62 - 3.4 $g/cm^3$

Optical properties

Refringence type: biaxial
Refringence sign: positive or negative
Refraction index $n_{\alpha}$: 1.57 - 1.67
Color: Various shades of green; rarely yellow, red, or white
Diaphaneity: transparent to subtranslucent
Luster: various