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General Lammerite Information |
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 Chemical Formula: |
Cu3[(As,P)O4]2 | ||
| Composition: |
Molecular Weight = 446.50 gm | ||
| Copper 42.70 % Cu 48.07 % Cu2O | |||
| Arsenic 25.17 % As 38.61 % As2O5 | |||
| Phosphorus 3.47 % P 7.95 % P2O5 | |||
| Oxygen 28.67 % O | |||
| ______ ______ | |||
| 100.00 % 94.63 % = TOTAL OXIDE | |||
| Empirical Formula: |
Cu3(AsO4)1.5(PO4)0.5 | ||
| Environment: |
Found on an old mineral specimen. | ||
| IMA Status: |
Approved IMA 1981 | ||
| Locality: |
Laurani, Oruro, Bolivia. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Franz Lammer, mineral collector of Leoben, Austria, who provided the first specimen. | ||
| Name Pronunciation: |
Lammerite + Pronunciation  |
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| Synonym: |
ICSD 201733 | ||
| PDF 39-385 | |||
Lammerite Image | |||
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Images:
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Images:
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Lammerite Crystallography |
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| Axial Ratios: |
a:b:c =0.4373:1:0.4641 | ||
| Cell Dimensions: |
a = 5.08, b = 11.616, c = 5.391, Z = 2; beta = 111.71° V = 295.55 Den(Calc)= 5.02 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.89(1), 2.52(0.9), 3.06(0.8), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Lammerite |
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| Cleavage: |
{010} Good, {100} Indistinct | ||
| Color: |
Dark green. | ||
| Density: |
5.18 | ||
| Hardness: |
3-4 - Calcite-Fluorite | ||
| Luster: |
Adamantine | ||
| Streak: |
light green | ||
Optical Properties of Lammerite |
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| Gladstone-Dale: |
CI meas= 0.058 (Good) - where the CI = (1-KPDmeas/KC) CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1843,KPDmeas= 0.1786,KC= 0.1896 Ncalc = 1.95 - 1.98 |
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| Optical Data: |
Biaxial (+), b=1.9, g=1.95, , 2V(Meas)=54. | ||
Calculated Properties of Lammerite |
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| Electron Density: |
Bulk Density (Electron Density)=4.68 gm/cc note: Specific Gravity of Lammerite =5.02 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.0001375977 Boson Index = 0.9998624023 |
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| Photoelectric: |
PELammerite = 36.95 barns/electron U=PELammerite x rElectron Density= 172.80 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lammerite is Not Radioactive |
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Lammerite Classification |
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| Dana Class: |
38.03.09.01 (38)Anhydrous Phosphates, etc | ||
| (38.03)(A+ B++)3 (XO4)2 | |||
| (38.03.09)Dana Group | |||
| Strunz Class: |
08.AB.30 08 - PHOSPHATES, ARSENATES, VANADATES | ||
| 08.A - Phosphates, etc. without additional anions, without H2O | |||
| 08.AB -With medium-sized cations | |||
Other Lammerite Information |
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| References: |
NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Lammerite : 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 15 - WWW-MINCRYST Search for Lammerite using: Visit our Advertisers for Lammerite : A Bijoux Google Search for LammeriteAdam's Minerals Google Search for Lammerite Cape Minerals Google Search for Lammerite Dakota Matrix Minerals Google Search for Lammerite Excalibur Mineral Corp. Google Search for Lammerite Exceptional Minerals Google Search for Lammerite John Betts Fine Minerals Search for Lammerite McDougall Minerals Google Search for Lammerite Mineral News Website Link Rock and Mineral Shows Google Search for Lammerite Weinrich Minerals, Inc. Google Search for Lammerite Ask about Lammerite here : Print or Cut-and-Paste your Lammerite Specimen Label here :
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