Lawrencite Mineral Data + Say LAWRENCITE


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General Lawrencite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Ni)Cl2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Fe2+0.75Ni0.25Cl2
Help on Environment: Environment: Occurs in meteoric iron.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1877
Help on Locality: Locality: Iron - nickel meteorites Link to MinDat.org Location Data.
Help on Synonym: Synonym: ICSD 4059
  PDF 1-1106
 

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Lawrencite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:4.89727
Help on Cell Dimensions: Cell Dimensions: a = 3.5775, c = 17.52, Z = 3; V = 194.19 Den(Calc)= 3.27
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.54(1), 1.8(0.63), 5.9(0.63),
Click Here for Large Lawrencite Structure Window Crystal Structure:

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Wyckoff R W G , Crystal Structures , 1 (1963) p.239-444, Second edition. Interscience Publishers, New York, New York, Note: cadmium chloride structure

 

Physical Properties of Lawrencite

Help on Cleavage: Cleavage: [0001] Perfect
Help on Color: Color: Greenish brown, White.
Help on Density: Density: 3.162
Help on Diaphaniety: Diaphaniety: Transparent
 

Optical Properties of Lawrencite

Help on Gladstone-Dale: 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
Help on Optical Data: Optical Data: Uniaxial (-), e=1.576, w=1.576, bire=0.0000.
 

Calculated Properties of Lawrencite

Help on Electron Density: Electron Density:

relectron=3.00 gm/cc
note: rLawrencite =3.16 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00826
Boson Index = 0.99174
Help on Photoelectric: Photoelectric:

PELawrencite = 18.47 barns/electron
U=PELawrencite x relectron= 55.44 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lawrencite is Not Radioactive

 

Lawrencite Classification

Help on  Dana Class: Dana Class: 9.2.3.1 (9)Anhydrous and Hydrated Halides
  (9.2)where A (X)2
  (9.2.3)Dana Group
 
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
Help on  Strunz Class: 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
 
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
 

Other Lawrencite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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

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Print or Cut-and-Paste your Lawrencite Specimen Label here :

Lawrencite

(Fe++,Ni)Cl2
Dana No: 9.2.3.1 Strunz No: III/A.07-10
Locality:

 

Notes:

 

 
   
 
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