Tatarskite Mineral Data

Tatarskite Mineral Data +

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General Tatarskite Information

Chemical Formula:

Ca6Mg2(SO4)2(CO3)2Cl4(OH)4·7(H2O)

Composition:

Molecular Weight = 937.17 gm

Calcium 25.66 % Ca 35.90 % CaO

Magnesium 5.19 % Mg 8.60 % MgO

Hydrogen 1.94 % H 17.30 % H₂O

Carbon 2.56 % C 9.39 % CO₂

Sulfur 6.84 % S 17.09 % SO₃

Chlorine 15.13 % Cl 15.13 % Cl

- % Cl -3.41 % -O=Cl₂

Oxygen 42.68 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₆Mg₂(SO₄)₂(CO₃)₂Cl₄(OH)₄·7(H₂O)

Environment:

Found in a drill core of marine evaporite deposits.

IMA Status:

Approved IMA 1963

Locality:

Caspian Depression, Kazakhstan. Link to MinDat.org Location Data.

Name Origin:

Named for Vitalii Borisovich Tatarskii (1907-), Russian mineralogist, Leningrad University.

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Tatarskite Crystallography

Crystal System:

OrthorhombicSpace Group: Unk

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

By Intensity(I/I_o): 2.967(1), 2.625(0.9), 5.34(0.8),

Physical Properties of Tatarskite

Cleavage:

[???] Fair, [???] Fair

Color:

Colorless, Light yellow.

Density:

2.341

Diaphaniety:

Transparent

Habit:

Crystalline - Coarse - Occurs as well-formed coarse sized crystals.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Tatarskite

Gladstone-Dale:

CI meas= -0.11 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.2767,KC= 0.2493

Optical Data:

Biaxial (-), a=1.567, b=1.654, g=1.722, bire=0.1550, 2V(Calc)=78, 2V(Meas)=83.

Calculated Properties of Tatarskite

Electron Density:

r_electron=2.37 gm/cc
note: r_Tatarskite=2.34 gm/cc.

Fermion Index

Fermion Index = 0.00653
Boson Index = 0.99347

Photoelectric:

PE_Tatarskite= 4.67 barns/electron
U=PE_Tatarskite x r_electron= 11.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tatarskite is Not Radioactive

Tatarskite Classification

Dana Class:

32.4.2.1 (32)Compound Sulfates

(32.4)(hydrous) with poly-anionic formula

(32.4.2)Dana Group

32.4.2.1 Tatarskite Ca6Mg2(SO4)2(CO3)2Cl4(OH)4·7(H2O) Unk Ortho

Strunz Class:

VI/D.19-40 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. Cations of medium and very big size

VI/D.19 - Devilline - Serperite - Rapidcreekite series

VI/D.19-05 Niedermayrite! Cu4Cd(SO4)2(OH)6·4(H2O) P 2₁/m 2/m

VI/D.19-10 Devilline CaCu4(SO4)2(OH)6·3(H2O) P 2₁/c 2/m

VI/D.19-20 Serpierite Ca(Cu,Zn)4(SO4)2(OH)6·3(H2O) C 2/c 2/m

VI/D.19-30 Orthoserpierite Ca(Cu,Zn)4(SO4)2(OH)6·3(H2O) P ca2₁ mm2

VI/D.19-32 Lautenthalite PbCu4(OH)6(SO4)2·3(H2O) P 2₁/c 2/m

VI/D.19-35 Arzrunite Cu4Pb2SO4(OH)4Cl6·2(H2O) Unk Ortho

VI/D.19-40 Tatarskite Ca6Mg2(SO4)2(CO3)2Cl4(OH)4·7(H2O) Unk Ortho

VI/D.19-50 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 2/m

Other Tatarskite Information

References:

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

See Also:

Links to other databases for Tatarskite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Tatarskite

Ca6Mg2(SO4)2(CO3)2Cl4(OH)4·7(H2O)
Dana No: 32.4.2.1 Strunz No: VI/D.19-40
Locality:

Notes: