Karpinskite Mineral Data

Karpinskite Mineral Data +

General Karpinskite Information

Chemical Formula:

(Mg,Ni)2Si2O5(OH)2 (?)

Composition:

Molecular Weight = 253.18 gm

Magnesium 9.60 % Mg 15.92 % MgO

Silicon 22.19 % Si 47.46 % SiO₂

Nickel 23.18 % Ni 29.50 % NiO

Hydrogen 0.80 % H 7.12 % H₂O

Oxygen 44.24 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NiMgSi₂O₅(OH)₂

Environment:

An inadequately described mineral.

IMA Status:

Valid Species (Pre-IMA) 1956

Locality:

Mizhne Tagilsk massif, Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Alexander Petrovich Karpinsky (1846-1936), Russian geologist and president of the Russian Academy of Sciences.

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Karpinskite Crystallography

Crystal System:

MonoclinicSpace Group: Unk

Physical Properties of Karpinskite

Cleavage:

[???] Perfect

Color:

Colorless, Greenish blue, Light blue.

Density:

2.53 - 2.63, Average = 2.58

Diaphaniety:

Translucent

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Greasy (Oily)

Streak:

white

Optical Properties of Karpinskite

Gladstone-Dale:

CI meas= -0.072 (Fair) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2215,KC= 0.2067

Optical Data:

Biaxial (-), a=1.553-1.57, g=1.569-1.594, bire=0.0160-0.0240

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Karpinskite

Electron Density:

r_electron=2.57 gm/cc
note: r_Karpinskite=2.58 gm/cc.

Fermion Index

Fermion Index = 0.02279
Boson Index = 0.97721

Photoelectric:

PE_Karpinskite= 10.13 barns/electron
U=PE_Karpinskite x r_electron= 26.01 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Karpinskite is Not Radioactive

Karpinskite Classification

Dana Class:

78.5.6.1 (78)Unclassified silicates

(78.5)possible phyllosilicates

(78.5.6)Dana Group

78.5.6.1 Karpinskite (Mg,Ni)2Si2O5(OH)2(?) Unk Mono

Strunz Class:

VIII/H.27-140 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 Karpinskite Information

References:

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

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Karpinskite

(Mg,Ni)2Si2O5(OH)2 (?)
Dana No: 78.5.6.1 Strunz No: VIII/H.27-140
Locality:

Notes: