Tatarskite Mineral Data

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.

Name Pronunciation:

Tatarskite + Pronunciation

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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

Diaphaneity:

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
Ncalc = 1.58

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:

Bulk Density (Electron Density)=2.37 gm/cc
note: Specific Gravity of Tatarskite =2.34 gm/cc.

Fermion Index:

Fermion Index = 0.0065362456
Boson Index = 0.9934637544

Photoelectric:

PE_Tatarskite= 4.67 barns/electron
U=PE_Tatarskite x rElectron Density= 11.07 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tatarskite is Not Radioactive

Tatarskite Classification

Dana Class:

32.04.02.01 (32)Compound Sulfates

(32.04)(hydrous) with poly-anionic formula

(32.04.02)Dana Group

32.04.02.01 Tatarskite Ca6Mg2(SO4)2(CO3)2Cl4(OH)4•7(H2O) Unk Ortho

Strunz Class:

07.DG.25 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DG -With large and medium sized cations; with NO3, CO3, B(OH)4, SiO4 or IO3

07.DG.25 Tatarskite Ca6Mg2(SO4)2(CO3)2Cl4(OH)4•7(H2O) Unk Ortho

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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Print or Cut-and-Paste your Tatarskite Specimen Label here :

Tatarskite

Ca6Mg2(SO4)2(CO3)2Cl4(OH)4•7(H2O)
Dana No: 32.04.02.01 Strunz No: 07.DG.25
Locality:

Notes: