Kassite Mineral Data

Kassite Mineral Data +

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General Kassite Information

Chemical Formula:

CaTi2O4(OH)2

Composition:

Molecular Weight = 235.09 gm

Calcium 16.54 % Ca 23.14 % CaO

Magnesium 0.31 % Mg 0.51 % MgO

Titanium 38.90 % Ti 64.90 % TiO₂

Vanadium 0.22 % V 0.39 % V₂O₅

Chromium 1.55 % Cr 2.02 % CrO

Iron 0.24 % Fe 0.31 % FeO

Hydrogen 1.01 % H 9.00 % H₂O

Oxygen 41.24 % O

______ ______

100.00 % 100.27 % = TOTAL OXIDE

Empirical Formula:

Ca_0.97Ti_1.91Cr_0.07Mg_0.03Fe²⁺_0.01V⁵⁺_0.01O_3.87(OH)_2.03·0.16(H₂O)

Environment:

Miarolytic cavities of alkalic pegmatites. Replaces ilmenite. Polymorph of cafetite.

IMA Status:

Approved IMA 1965

Locality:

Aftikanda massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Kicolai Grigorevich Kassin (1885-1949), Russian Geologist and academician, discoverer of the Afrikanda massif on the Kola Peninsula.

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Kassite Crystallography

Axial Ratios:

a:b:c =0.5865:1:1.0618

Cell Dimensions:

a = 5.273, b = 8.99, c = 9.546, Z = 4; beta = 90.47° V = 452.51 Den(Calc)= 3.45

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/a

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

By Intensity(I/I_o): 3.3(1)(112,), 3.273(0.97)(022), 1.762(0.41)(134,204), 2.282(0.37)(132), 4.763(0.26)(002), 1.516(0.24)(330), 2.603(0.23)(130), 2.316(0.19)(202), 1.776(0.18)(204

Crystal Structure:

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Grey I E , Mumme W G , Pekov I V , Pushcharovsky D Y , American Mineralogist , 88 (2003) p.1331-1335, The crystal structure of chromian kassite from the Saranovskoye deposit,, Northern Urals, Russia

Physical Properties of Kassite

Cleavage:

[010] Perfect, [101] Indistinct

Color:

Brown red, Colorless, Light yellow.

Density:

3.42

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Pseudo Hexagonal - Crystals show a hexagonal outline.

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Hardness:

5 - Apatite

Luster:

Adamantine

Streak:

white

Optical Properties of Kassite

Gladstone-Dale:

CI meas= 0.06 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.069 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3179,KPDmeas= 0.3207,KC= 0.3413

Optical Data:

Biaxial (-), a=1.95, b=2.13, g=2.21, bire=0.2600, 2V(Calc)=62, 2V(Meas)=58. Dispersion very strong, r > v.

Calculated Properties of Kassite

Electron Density:

r_electron=3.34 gm/cc
note: r_Kassite=3.42 gm/cc.

Fermion Index

Fermion Index = 0.05255
Boson Index = 0.94745

Photoelectric:

PE_Kassite= 8.91 barns/electron
U=PE_Kassite x r_electron= 29.76 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Kassite is Not Radioactive

Kassite Classification

Dana Class:

8.3.9.1 (8)Multiple Oxides with Nb, Ta, and Ti

(8.3)where A (B2O6)

(8.3.9)Dana Group

8.3.9.1 Kassite CaTi2O4(OH)2 P 2₁/a 2/m

Strunz Class:

IV/D.20-10 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.20 - Kassite - Lucasite-(Ce) series

IV/D.20-10 Kassite CaTi2O4(OH)2 P 2₁/a 2/m

IV/D.20-20 Kobeite-(Y) (Y,U)(Ti,Nb)2(O,OH)6(?) Cubic Cubic

IV/D.20-30 Lucasite-(Ce) CeTi2(O,OH)6 I2/a 2/m

Other Kassite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, AmMin 90:771) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Kassite :
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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Print or Cut-and-Paste your Kassite Specimen Label here :

Kassite

CaTi2O4(OH)2
Dana No: 8.3.9.1 Strunz No: IV/D.20-10
Locality:

Notes: