Kimrobinsonite Mineral Data

General Kimrobinsonite Information

Chemical Formula:

Ta(OH)3(O,CO3)

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

Empirical Formula:

Ta(OH)₃O_0.75(CO₃)_0.25

Environment:

Deeply weathered granite.

IMA Status:

Approved IMA 1985

Locality:

Mt. Holland, Western Australia. Link to MinDat.org Location Data.

Name Origin:

Named for Kim Robertson, (1951-), Autralian geologist of Perth, Western Autralia, who found the first specimen.

Name Pronunciation:

Kimrobinsonite + Pronunciation

Search for Kimrobinsonite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Kimrobinsonite Crystallography

Cell Dimensions:

a = 3.812, Z = 1; V = 55.39 Den(Calc)= 7.76

Crystal System:

IsometricSpace Group: Unk

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

By Intensity(I/I_o): 3.808(1), 2.696(0.7), 1.907(0.3),

Physical Properties of Kimrobinsonite

Color:

Lemon white.

Diaphaneity:

Translucent

Habit:

Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.

Habit:

Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).

Habit:

Friable - Loosley cohesive material that granulates with your fingers.

Hardness:

2.5 - Finger Nail

Luster:

Earthy (Dull)

Streak:

white

Optical Properties of Kimrobinsonite

Gladstone-Dale:

CI calc= 0.085 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1585,KC= 0.1733
Ncalc = 2.34

Optical Data:

Isotropic, n=2.23.

Calculated Properties of Kimrobinsonite

Electron Density:

Bulk Density (Electron Density)=6.80 gm/cc
note: Specific Gravity of Kimrobinsonite =7.76 gm/cc.

Fermion Index:

Fermion Index = 0.0003465871
Boson Index = 0.9996534129

Photoelectric:

PE_{Kimrobinsonite}= 820.93 barns/electron
U=PE_{Kimrobinsonite} x rElectron Density=5,583.94 barns/cc.

Radioactivity:

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

Kimrobinsonite Classification

Dana Class:

06.04.08.01 (06)Hydroxides and Oxides Containing Hydroxyl

(06.04)containing multiple cations

(06.04.08)Dana Group

06.04.08.01 Kimrobinsonite Ta(OH)3(O,CO3) Unk Cubic

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

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 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

Search for Kimrobinsonite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Kimrobinsonite :

A Bijoux Google Search for Kimrobinsonite
Adam's Minerals Google Search for Kimrobinsonite
Cape Minerals Google Search for Kimrobinsonite
Dakota Matrix Minerals Google Search for Kimrobinsonite
Excalibur Mineral Corp. Google Search for Kimrobinsonite
Exceptional Minerals Google Search for Kimrobinsonite
John Betts Fine Minerals Search for Kimrobinsonite
McDougall Minerals Google Search for Kimrobinsonite
Mineral News Website Link
Rock and Mineral Shows Google Search for Kimrobinsonite
Weinrich Minerals, Inc. Google Search for Kimrobinsonite

Ask about Kimrobinsonite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Kimrobinsonite

Ta(OH)3(O,CO3)
Dana No: 06.04.08.01 Strunz No: 04.FG.15
Locality:

Notes: