Lawrencite Mineral Data + 
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- 9.2.3.1 Lawrencite (Fe,Ni)Cl2 R 3m 3 2/m
- 9.2.3.2 Scacchite MnCl2 R 3m 3 2/m
- 9.2.3.3 Chloromagnesite* MgCl2 R 3m 3 2/m
- III/A.07-05 Chloromagnesite* MgCl2 R 3m 3 2/m
- III/A.07-10 Lawrencite (Fe,Ni)Cl2 R 3m 3 2/m
- III/A.07-20 Scacchite MnCl2 R 3m 3 2/m
- III/A.07-30 Tolbachite CuCl2 C 2/m 2/m
General Lawrencite Information |
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 Chemical Formula: |
(Fe++,Ni)Cl2 | ||
| Composition: |
Molecular Weight = 127.46 gm | ||
| Iron 32.86 % Fe 42.27 % FeO | |||
| Nickel 11.51 % Ni 14.65 % NiO | |||
| Chlorine 55.63 % Cl 55.63 % Cl | |||
| - % Cl -12.55 % -O=Cl2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Fe2+0.75Ni0.25Cl2 | ||
| Environment: |
Occurs in meteoric iron. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1877 | ||
| Locality: |
Iron - nickel meteorites Link to MinDat.org Location Data. | ||
| Synonym: |
ICSD 4059 | ||
| PDF 1-1106 | |||
Search for Lawrencite Images | |||
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Images:
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Lawrencite Crystallography |
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| Axial Ratios: |
a:c = 1:4.89727 | ||
| Cell Dimensions: |
a = 3.5775, c = 17.52, Z = 3; V = 194.19 Den(Calc)= 3.27 | ||
| Crystal System: |
Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.54(1), 1.8(0.63), 5.9(0.63), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Lawrencite |
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| Cleavage: |
[0001] Perfect | ||
| Color: |
Greenish brown, White. | ||
| Density: |
3.162 | ||
| Diaphaniety: |
Transparent | ||
Optical Properties of Lawrencite |
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| Gladstone-Dale: |
CI meas= 0.352 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= 0.373 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1761,KPDmeas= 0.1822,KC= 0.281 |
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| Optical Data: |
Uniaxial (-), e=1.576, w=1.576, bire=0.0000. | ||
Calculated Properties of Lawrencite |
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| Electron Density: |
relectron=3.00 gm/cc |
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| Fermion Index |
Fermion Index = 0.00826 Boson Index = 0.99174 |
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| Photoelectric: |
PELawrencite = 18.47 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Lawrencite is Not Radioactive |
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Lawrencite Classification |
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| Dana Class: |
9.2.3.1 (9)Anhydrous and Hydrated Halides | ||
| (9.2)where A (X)2 | |||
| (9.2.3)Dana Group | |||
| Strunz Class: |
III/A.07-10 III - Halogenides | ||
| III/A - Simple Halogenides, without water Metal : Halogen = 1 : 2, 1 : 3 | |||
| III/A.07 - Tolbachite series | |||
Other Lawrencite Information |
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| References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
| See Also: |
Links to other databases for Lawrencite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 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 Lawrencite using: Visit our Advertisers for Lawrencite : AA Mineral SpecimensB & L Fine Minerals 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 T G Fine Minerals Wrights Rock Shop Translate Lawrencite Mineral Data : Ask about Lawrencite here : Print or Cut-and-Paste your Lawrencite Specimen Label here :
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