Sidwillite Mineral Data + 
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Dan Weinrich Fine Minerals
Full-time professional mineral dealer with over 31 years experience in mineral collecting
And 15 years selling mineral specimens on the internet and at major mineral shows
- 4.5.6.1 Sidwillite MoO3·2(H2O) P 21/n 2/m
- IV/E.03-10 Molybdite MoO3 Pbnm 2/m 2/m 2/m
- IV/E.03-20 Sidwillite MoO3·2(H2O) P 21/n 2/m
- IV/E.03-30 Ilsemannite Mo3O8·n(H2O)(?) None
- IV/E.03-40 Bamfordite! FeMo2O6(OH)3·(H2O) P1 or P1 Tri
General Sidwillite Information |
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 Chemical Formula: |
MoO3·2(H2O) | ||
| Composition: |
Molecular Weight = 179.97 gm | ||
| Molybdenum 53.31 % Mo 79.98 % MoO3 | |||
| Hydrogen 2.24 % H 20.02 % H2O | |||
| Oxygen 44.45 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
MoO3·2(H2O) | ||
| IMA Status: |
Approved IMA 1985 | ||
| Locality: |
Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 16521 | ||
| PDF 39-363 | |||
Sidwillite Image | |||
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Images:
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Sidwillite Crystallography |
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| Axial Ratios: |
a:b:c =0.768:1:0.7581 | ||
| Cell Dimensions: |
a = 10.618, b = 13.825, c = 10.482, Z = 16; beta = 91.61° V = 1,538.09 Den(Calc)= 3.11 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.322(1), 3.248(0.93), 6.94(0.84), | ||
Physical Properties of Sidwillite |
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| Cleavage: |
[010] Perfect | ||
| Color: |
Yellow, Resin yellow, Light green. | ||
| Density: |
3.12 | ||
| Diaphaniety: |
Transparent | ||
| Hardness: |
2.5 - Finger Nail | ||
| Luster: |
Resinous | ||
| Streak: |
white | ||
Optical Properties of Sidwillite |
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| Gladstone-Dale: |
CI meas= -0.364 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.369 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.3526,KPDmeas= 0.3515,KC= 0.2576 |
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| Optical Data: |
Biaxial (-), a=1.7, b=2.21, g=2.38, bire=0.6800, 2V(Calc)=48, 2V(Meas)=48. | ||
Calculated Properties of Sidwillite |
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| Electron Density: |
relectron=2.98 gm/cc |
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| Fermion Index |
Fermion Index = 0.13599 Boson Index = 0.86401 |
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| Photoelectric: |
PESidwillite = 85.40 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Sidwillite is Not Radioactive |
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Sidwillite Classification |
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| Dana Class: |
4.5.6.1 (4)Simple Oxides | ||
| (4.5)with a cation charge of 6+ (A++++++ O3) | |||
| (4.5.6)Dana Group | |||
| Strunz Class: |
IV/E.03-20 IV - Oxides | ||
| IV/E - Oxides with metal : oxygen < 1:2 (M2O5, MO3) | |||
| IV/E.03 - Molybdite - Ilsemannite series | |||
Other Sidwillite Information |
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| References: |
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Sidwillite : 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 Sidwillite using: Visit our Advertisers for Sidwillite : Translate Sidwillite Mineral Data : Ask about Sidwillite here : Print or Cut-and-Paste your Sidwillite Specimen Label here :
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