Cafarsite Mineral Data + 
|
[New Updates] [Gallery 1] [Gallery 2] [Gallery 3] [Rock Shop Gallery]
Serving the mineral collector and educator community since 1970
Over 900,000 mineral specimens in stock
New minerals acquired weekly - Wright's Rock Shop
- 45.1.4.1 Cafarsite Ca8(Ti,Fe,Fe,Mn)6-7(AsO3)12·4(H2O) P n3 2/m 3
- IV/J.05-10 Chadwickite! (UO2)H(AsO3) Tetra
- IV/J.05-20 Cafarsite Ca8(Ti,Fe,Fe,Mn)6-7(AsO3)12·4(H2O) P n3 2/m 3
- IV/J.05-50 Georgbokiite! Cu5O2(SeO3)2Cl2 P 21/c 2/m
- IV/J.05-55 Chloromenite! Cu9O2(SeO3)4Cl6 I2/m 2/m
- IV/J.05-60 Ilinskite! NaCu5O2(SeO3)2Cl Pbnm 2/m 2/m 2/m
General Cafarsite Information |
|||
 Chemical Formula: |
Ca8(Ti,Fe++,Fe+++,Mn)6-7(As+++O3)12·4(H2O) | ||
| Composition: |
Molecular Weight = 2,230.31 gm | ||
| Calcium 14.38 % Ca 20.11 % CaO | |||
| Titanium 7.51 % Ti 12.54 % TiO2 | |||
| Manganese 1.23 % Mn 1.59 % MnO | |||
| Iron 7.51 % Fe 6.44 % FeO / 3.58 % Fe2O3 | |||
| Arsenic 40.31 % As 53.22 % As2O3 | |||
| Hydrogen 0.36 % H 3.23 % H2O | |||
| Oxygen 28.69 % O | |||
| ______ ______ | |||
| 100.00 % 100.72 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca8Ti3.5Fe2+2Fe3+Mn2+0.5(AsO3)12·4(H2O) | ||
| IMA Status: |
Approved IMA 1966 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 200144 | ||
| PDF 19-197 | |||
Cafarsite Image | |||
|
Images:
|
|
||
|
Images:
|
|
||
Cafarsite Crystallography |
|||
| Cell Dimensions: |
a = 16.01, Z = 4; V = 4,103.69 Den(Calc)= 3.61 | ||
| Crystal System: |
Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P n3 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.83(1), 2.75(0.8), 3.15(0.7), | ||
Physical Properties of Cafarsite |
|||
| Cleavage: |
None | ||
| Color: |
Brownish yellow, Brownish black, Dark brown, Dark red. | ||
| Density: |
3.9 | ||
| Diaphaniety: |
Translucent to Opaque | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Hardness: |
5.5-6 - Knife Blade-Orthoclase | ||
| Luster: |
Sub Metallic | ||
| Streak: |
yellowish brown | ||
Optical Properties of Cafarsite |
|||
| Optical Data: |
NCalc= 1.87 - from Gladstone-Dale relationship (KC = 0.242) where Ncalc=Dcalc*KC+1 NCalc= 1.94 - from Gladstone-Dale relationship (KC = 0.242) where Ncalc=Dmeas*KC+1 |
||
Calculated Properties of Cafarsite |
|||
| Electron Density: |
relectron=3.40 gm/cc |
||
| Fermion Index |
Fermion Index = 0.01164 Boson Index = 0.98836 |
||
| Photoelectric: |
PECafarsite = 33.41 barns/electron |
||
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Cafarsite is Not Radioactive |
||
Cafarsite Classification |
|||
| Dana Class: |
45.1.4.1 (45)Acid and normal Antimonites, Arsenites and Phosphites | ||
| (45.1)with miscellaneous formulae | |||
| (45.1.4)Dana Group | |||
| Strunz Class: |
IV/J.05-20 IV - Oxides | ||
| IV/J - Arsenides with [AsO3]3- groups | |||
| IV/J.05 - Asbeckasite - Cafarsite series | |||
Other Cafarsite Information |
|||
| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Cafarsite : 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 - WWW-MINCRYST 13 -École des Mines de Paris Search for Cafarsite using: Visit our Advertisers for Cafarsite : Translate Cafarsite Mineral Data : Ask about Cafarsite here : Print or Cut-and-Paste your Cafarsite Specimen Label here :
|
||
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |