Mineralogy Database

Kimrobinsonite Mineral Data

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General Kimrobinsonite Information

Help on Chemical  Formula: Chemical Formula: Ta(OH)3(O,CO3)
Help on Composition: Composition: Molecular Weight = 258.97 gm
   Tantalum  69.87 %  Ta   85.32 % Ta2O5
   Hydrogen   1.17 %  H    10.43 % H2O
   Carbon     1.16 %  C     4.25 % CO2
   Oxygen    27.80 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ta(OH)3O0.75(CO3)0.25
Help on Environment: Environment: Deeply weathered granite.
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Mt. Holland, Western Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Kim Robertson, (1951-), Autralian geologist of Perth, Western Autralia, who found the first specimen.
Help on Name Pronunciation: Name Pronunciation: Kimrobinsonite + Pronunciation Say KIMROBINSONITE

Kimrobinsonite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 3.812, Z = 1; V = 55.39 Den(Calc)= 7.76
Help on Crystal System: Crystal System: Isometric Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.808(1), 2.696(0.7), 1.907(0.3),

Physical Properties of Kimrobinsonite

Help on Color: Color: Lemon white.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Friable - Loosley cohesive material that granulates with your fingers.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white

Optical Properties of Kimrobinsonite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.085 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1585,KC= 0.1733
Ncalc = 2.34
Help on Optical Data: Optical Data: Isotropic, n=2.23.

Calculated Properties of Kimrobinsonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.80 gm/cc
note: Specific Gravity of Kimrobinsonite =7.76 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003465871
Boson Index = 0.9996534129
Help on Photoelectric: Photoelectric: PEKimrobinsonite = 820.93 barns/electron
U=PEKimrobinsonite x rElectron Density=5,583.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kimrobinsonite is Not Radioactive

Kimrobinsonite Classification

Help on  Dana Class: Dana Class: (06)Hydroxides and Oxides Containing Hydroxyl
  (06.04)containing multiple cations
  (06.04.08)Dana Group Kimrobinsonite Ta(OH)3(O,CO3) Unk Cubic
Help on  Strunz Class: Strunz Class: 04.FG.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.F - Hydroxides (without V or U)
  04.FG -Hydroxides with OH, without H2O; unclassified
04.FG.15 Kimrobinsonite Ta(OH)3(O,CO3) Unk Cubic

Other Kimrobinsonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Kimrobinsonite :
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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Dana No: Strunz No: 04.FG.15





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