Sillenite Mineral Data + 
|
[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!
- 4.3.12.1 Sillenite Bi12SiO20 I 23 2 3
- IV/C.02-10 Arsenolite As2O3 F d3m 4/m 3 2/m
- IV/C.02-20 Senarmontite Sb2O3 F d3m 4/m 3 2/m
- IV/C.02-30 Bismite Bi2O3 P 21/c 2/m
- IV/C.02-35 Sphaerobismoite Bi2O3 P 42212 or P 41/n Tetra
- IV/C.02-40 Sillenite Bi12SiO20 I 23 2 3
- IV/C.02-50 Chrombismite! Bi16CrO27 I 4,I 4-,I 4/m Tetra
General Sillenite Information |
|||
 Chemical Formula: |
Bi12SiO20 | ||
| Composition: |
Molecular Weight = 2,855.84 gm | ||
| Silicon 0.98 % Si 2.10 % SiO2 | |||
| Bismuth 87.81 % Bi 97.90 % Bi2O3 | |||
| Oxygen 11.20 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Bi12SiO20 | ||
| Environment: |
Associated with bismutite | ||
| IMA Status: |
Valid Species (Pre-IMA) 1943 | ||
| Locality: |
Durango, Mexico. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named fo rLars Gunnar Sillén (1916-1970) of Stockholm, Sweden for his work on Bi2O3 polymorphs. | ||
| Synonym: |
ICSD 28443 | ||
| PDF 37-485 | |||
Sillenite Image | |||
|
Images:
|
|
||
Sillenite Crystallography |
|||
| Cell Dimensions: |
a = 10.184, Z = 2; V = 1,056.22 Den(Calc)= 8.98 | ||
| Crystal System: |
Isometric - TetartoidalH-M Symbol (2 3) Space Group: I 23 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.22(1), 1.74(0.9), 2.73(0.8), | ||
Physical Properties of Sillenite |
|||
| Color: |
Brownish green, Green, Gray green, Yellow green, Olive green. | ||
| Density: |
9.3 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Habit: |
Cubic Crystals - Occurs as cubic shaped crystals. | ||
| Habit: |
Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite). | ||
| Habit: |
Massive - Uniformly indistinguishable crystals forming large masses. | ||
| Hardness: |
1-2 - Between Talc and Gypsum | ||
| Streak: |
gray green | ||
Optical Properties of Sillenite |
|||
| Gladstone-Dale: |
CI meas= -0.046 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.084 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.167,KPDmeas= 0.1613,KC= 0.1542 |
||
| Optical Data: |
Isotropic, n=2.5. | ||
Calculated Properties of Sillenite |
|||
| Electron Density: |
relectron=7.62 gm/cc |
||
| Fermion Index |
Fermion Index = 0.00051 Boson Index = 0.99949 |
||
| Photoelectric: |
PESillenite =1,724.73 barns/electron |
||
| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Sillenite is Not Radioactive |
||
Sillenite Classification |
|||
| Dana Class: |
4.3.12.1 (4)Simple Oxides | ||
| (4.3)with a cation charge of 3+ (A+++2 O3) | |||
| (4.3.12)Dana Group | |||
| Strunz Class: |
IV/C.02-40 IV - Oxides | ||
| IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds) | |||
| IV/C.02 - Arsenolite - Sillenite series | |||
Other Sillenite Information |
|||
| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Sillenite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Sillenite using: Visit our Advertisers for Sillenite : AA Mineral SpecimensB & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Sillenite Mineral Data : Ask about Sillenite here : Print or Cut-and-Paste your Sillenite Specimen Label here :
|
||
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |
 |