Lizardite Mineral Data

Lizardite Mineral Data +

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General Lizardite Information

Chemical Formula:

Mg3Si2O5(OH)4

Composition:

Molecular Weight = 277.11 gm

Magnesium 26.31 % Mg 43.63 % MgO

Silicon 20.27 % Si 43.36 % SiO₂

Hydrogen 1.45 % H 13.00 % H₂O

Oxygen 51.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₃Si₂O₅(OH)₄

IMA Status:

Valid Species (Pre-IMA) 1956

Locality:

Link to MinDat.org Location Data.

Synonym:

Orthoantigorite

Lizardite Image

Images:

Lizardite

Comments: Lizardite pseudomorphously replacing olivine.
Location: Snarum, Norway. Scale: 2x2 cm.
© Dave Barthelmy

Lizardite Crystallography

Axial Ratios:

a:b:c =0.5769:1:4.6426

Cell Dimensions:

a = 5.308, b = 9.2, c = 42.712, Z = 12; alpha = 90°, beta = 90°, gamma = 90° V = 2,085.78 Den(Calc)= 2.65

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.12(1), 2.379(0.9), 3.56(0.8),

Crystal Structure:

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Mellini M , American Mineralogist , 67 (1982) p.587-598, The crystal structure of lizardite 1T: hydrogen bonds and polytypism

View Additional jPOWD Structure files for Lizardite
[1] [2] [3] [4] [5] [6] [7]

Physical Properties of Lizardite

Cleavage:

[001] Perfect

Color:

Green, Green blue, Yellow, White.

Density:

2.55 - 2.6, Average = 2.57

Diaphaniety:

Translucent

Hardness:

2.5 - Finger Nail

Streak:

white

Optical Properties of Lizardite

Gladstone-Dale:

CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.211,KPDmeas= 0.2171,KC= 0.2217

Optical Data:

Biaxial (-), a=1.541-1.5625, b=1.565, g=1.553-1.568, bire=0.0055-0.0120, 2V(Meas)=37-61.

Calculated Properties of Lizardite

Electron Density:

r_electron=2.60 gm/cc
note: r_Lizardite=2.58 gm/cc.

Fermion Index

Fermion Index = 0.03603
Boson Index = 0.96397

Photoelectric:

PE_Lizardite= 1.39 barns/electron
U=PE_Lizardite x r_electron= 3.62 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lizardite is Not Radioactive

Lizardite Classification

Dana Class:

71.1.2b.2 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.1)with 1:1 layers

(71.1.2b)Serpentine group (Lizardite subgroup)

71.1.2b.1 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono

71.1.2b.2 Lizardite Mg3Si2O5(OH)4 P1 1

71.1.2b.3 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2

71.1.2b.4 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono

Strunz Class:

VIII/H.27-20 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups

VIII/H.27 - Serpentine group

VIII/H.27-10 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m

VIII/H.27-20 Lizardite Mg3Si2O5(OH)4 P1 1

VIII/H.27-30 Clinochrysotile Mg3Si2O5(OH)4 Cc, C 2/m Mono

VIII/H.27-40 Orthochrysotile Mg3Si2O5(OH)4 Unk Ortho

VIII/H.27-50 Parachrysotile Mg3Si2O5(OH)4 Unk Ortho

VIII/H.27-55 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono

VIII/H.27-60 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono

VIII/H.27-70 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m

VIII/H.27-80 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m

VIII/H.27-90 Zinalsite Zn2AlSi2O5(OH)4·2(H2O)(?) Mono

VIII/H.27-95 Dozyite (Mg7Al2)(Si4Al2)O15(OH)12 Cm m

VIII/H.27-100 Amesite Mg2Al(SiAl)O5(OH)4 C1 1

VIII/H.27-110 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 6₃ 6

VIII/H.27-120 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 3₁m 3m

VIII/H.27-140 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono

VIII/H.27-150 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2

VIII/H.27-160 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m

VIII/H.27-170 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2

VIII/H.27-180 Maufite (Mg,Ni)Al4Si3O13·4(H2O)(?) Mono ? Mono

VIII/H.27-190 Carlosturanite (Mg,Fe,Ti,Mn)21(Si,Al)12O28(OH)34 Cm m

Other Lizardite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Lizardite

Mg3Si2O5(OH)4
Dana No: 71.1.2b.2 Strunz No: VIII/H.27-20
Locality:

Notes: