Larsenite Mineral Data + 
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- 51.2.1.1 Trimerite CaMn2Be3(SiO4)3 P 21/c 2/m
- 51.2.1.2 Larsenite PbZnSiO4 Pnam 2/m 2/m 2/m
- 51.2.1.3 Esperite PbCa3Zn4(SiO4)4 B21/m 2/m
- VIII/A.03-10 Trimerite CaMn2Be3(SiO4)3 P 21/c 2/m
- VIII/A.03-20 Esperite PbCa3Zn4(SiO4)4 B21/m 2/m
- VIII/A.03-30 Larsenite PbZnSiO4 Pnam 2/m 2/m 2/m
General Larsenite Information |
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 Chemical Formula: |
PbZnSiO4 | ||
| Composition: |
Molecular Weight = 364.67 gm | ||
| Zinc 17.93 % Zn 22.32 % ZnO | |||
| Silicon 7.70 % Si 16.48 % SiO2 | |||
| Lead 56.82 % Pb 61.21 % PbO | |||
| Oxygen 17.55 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
PbZn(SiO4) | ||
| Environment: |
Metamorphosed zinc deposits. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1928 | ||
| Locality: |
Franklin, New Jersy Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Esper Signius Larsen, Jr. (1879-1961), petrologist and Professor of Geology, Harvard University. | ||
| Synonym: |
ICSD 26840 | ||
| PDF 20-607 | |||
Larsenite Image | |||
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Images:
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Larsenite Crystallography |
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| Axial Ratios: |
a:b:c =0.4347:1:0.2668 | ||
| Cell Dimensions: |
a = 8.244, b = 18.963, c = 5.06, Z = 8; V = 791.03 Den(Calc)= 6.12 | ||
| Crystal System: |
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnam | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.17(1), 3.01(0.6), 2.83(0.5), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Larsenite |
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| Cleavage: |
[010] Distinct | ||
| Color: |
White. | ||
| Density: |
5.9 | ||
| Diaphaniety: |
Transparent | ||
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. | ||
| Habit: |
Acicular - Occurs as needle-like crystals. | ||
| Habit: |
Striated - Parallel lines on crystal surface or cleavage face. | ||
| Hardness: |
3 - Calcite | ||
| Luminescence: |
Piezoelectric. | ||
| Luster: |
Adamantine | ||
| Magnetism: |
Nonmagnetic | ||
| Streak: |
white | ||
Optical Properties of Larsenite |
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| Gladstone-Dale: |
CI meas= -0.059 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1541,KPDmeas= 0.1599,KC= 0.1509 |
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| Optical Data: |
Biaxial (-), a=1.92, b=1.95, g=1.96, bire=0.0400, 2V(Calc)=58, 2V(Meas)=80. Dispersion r > v. | ||
Calculated Properties of Larsenite |
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| Electron Density: |
relectron=5.30 gm/cc |
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| Fermion Index |
Fermion Index = 0.1366 Boson Index = 0.8634 |
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| Photoelectric: |
PELarsenite =1,016.78 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Larsenite is Not Radioactive |
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Larsenite Classification |
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| Dana Class: |
51.2.1.2 (51)Nesosilicate Insular SiO4 Groups Only | ||
| (51.2)with cations in [4] as well as >[4] | |||
| (51.2.1)Trimerite group | |||
| Strunz Class: |
VIII/A.03-30 VIII - Silicates | ||
| VIII/A - Nesosilicates, with [SiO4]4- groups, cations of tetrahedric orientation [4] | |||
| VIII/A.03 - Trimerite - Larsenite series | |||
Other Larsenite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) | ||
| See Also: |
Links to other databases for Larsenite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 - Franklin Minerals(Dunn) 6 - Franklin Minerals(Palache) 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (MinSocAm) 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 - WWW-MINCRYST 17 -École des Mines de Paris Search for Larsenite using: Visit our Advertisers for Larsenite : Translate Larsenite Mineral Data : Ask about Larsenite here : Print or Cut-and-Paste your Larsenite Specimen Label here :
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