Alamosite Mineral Data + 
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- 65.7.1.1 Alamosite PbSiO3 Pn m
- VIII/F.32-10 Alamosite PbSiO3 Pn m
- VIII/F.32-20 Aerinite (Ca,Na)6FeAl(Fe,Mg)2(Al,Mg)6[Si12O36(OH)12H][(H2O)12(CO3)] P 3c1 3m
General Alamosite Information |
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 Chemical Formula: |
PbSiO3 | ||
| Composition: |
Molecular Weight = 283.28 gm | ||
| Silicon 9.91 % Si 21.21 % SiO2 | |||
| Lead 73.14 % Pb 78.79 % PbO | |||
| Oxygen 16.94 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Pb(SiO3) | ||
| Environment: |
As a rare secondary mineral in the oxidized zone of lead-bearing base metal deposits. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1909 | ||
| Locality: |
From Mexico, in Sonora, at Alamos, and the San Pascual mine, Zimpan, Hidalgo. In the USA, from Arizona, in the Mammoth-St. Anthony mine, at Tiger, Pinal Co., the Lucky Cuss mine, Tomb Link to MinDat.org Location Data. | ||
| Name Origin: |
For the Mexican type locality at Alamos. | ||
| Synonym: |
ICSD 26812 | ||
| PDF 29-782 | |||
Alamosite Image | |||
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Images:
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Alamosite Crystallography |
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| Axial Ratios: |
a:b:c =1.7369:1:1.5936 | ||
| Cell Dimensions: |
a = 12.254, b = 7.055, c = 11.243, Z = 12; beta = 113.15° V = 893.71 Den(Calc)= 6.32 | ||
| Crystal System: |
Monoclinic - DomaticH-M Symbol (m) Space Group: Pn | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.3(1), 3.34(1), 3.56(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Alamosite |
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| Cleavage: |
[010] Perfect | ||
| Color: |
Colorless, White. | ||
| Density: |
6.49 | ||
| Diaphaniety: |
Transparent to Translucent | ||
| Hardness: |
4.5 - Between Fluorite and Apatite | ||
| Luster: |
Adamantine | ||
| Streak: |
white | ||
Optical Properties of Alamosite |
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| Gladstone-Dale: |
CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.019 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1517,KPDmeas= 0.1477,KC= 0.1489 |
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| Optical Data: |
Biaxial (-), a=1.947, b=1.961, g=1.968, bire=0.0210, 2V(Calc)=70, 2V(Meas)=65. | ||
Calculated Properties of Alamosite |
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| Electron Density: |
relectron=5.50 gm/cc |
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| Fermion Index |
Fermion Index = 0.16635 Boson Index = 0.83365 |
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| Photoelectric: |
PEAlamosite =1,325.74 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Alamosite is Not Radioactive |
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Alamosite Classification |
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| Dana Class: |
65.7.1.1 (65)Inosilicate Single-Width Unbranched Chains, W=1 | ||
| (65.7)with chains P>7 | |||
| (65.7.1)Dana Group | |||
| Strunz Class: |
VIII/F.32-10 VIII - Silicates | ||
| VIII/F - Inosilicates (chain and band) Twelve chains[Si12O36]24- | |||
| VIII/F.32 - Alamosite series | |||
Other Alamosite Information |
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| References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Alamosite : 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 Alamosite using: Visit our Advertisers for Alamosite : Translate Alamosite Mineral Data : Ask about Alamosite here : Print or Cut-and-Paste your Alamosite Specimen Label here :
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