| |
 |
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)3O0.75(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  |
| |
Kimrobinsonite Crystallography
|
| Cell Dimensions: |
a = 3.812, Z = 1; V = 55.39 Den(Calc)= 7.76 |
| Crystal System: |
Isometric Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 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: |
PEKimrobinsonite = 820.93 barns/electron
U=PEKimrobinsonite 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 :
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
Espaņol
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:
|
|
| |
| |
|
| |
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.