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Lemanskiite Mineral Data

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General Lemanskiite Information

Help on Chemical  Formula: Chemical Formula: NaCaCu5(AsO4)4Cl•5H2O
Help on Composition: Composition: Molecular Weight = 1,060.88 gm
   Sodium     2.25 %  Na    3.04 % Na2O
   Calcium    3.78 %  Ca    5.29 % CaO
   Copper    30.01 %  Cu   37.57 % CuO
   Arsenic   28.25 %  As   43.33 % As2O5
   Hydrogen   0.94 %  H     8.37 % H2O
   Chlorine   3.21 %  Cl    3.21 % Cl
               -   %   Cl   -0.72 % -O=Cl2   
   Oxygen    31.57 %  O
            ______        ______ 
            100.00 %      100.08 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.04CaCu5.01(AsO4)4Cl0.96•4.93(H2O)
Help on Environment: Environment: Found in mine dump material from the abandoned Abundancia gold mine, Ca-analog of zdenekite, dimorphous with lavendulan.
Help on IMA Status: IMA Status: Approved IMA 2001 (Dana # Added)
Help on Locality: Locality: El Guanaco mining district, south of Cerro La Estrella, about 95 km east of Taltal, in Region II, Antofagasta Province, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Chester (Chet) S. Lemanski, Jr (b. 1947),.
Help on Synonym: Synonym: IMA1999-037

Lemanskiite Image

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Comments: Electric blue lemanskiite sprays on matrix.
Location: Abundancia Mine, Guanaco, Chile. Scale: Picture size 1.2 cm.
© John Veevaert

Lemanskiite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.6803
Help on Cell Dimensions: Cell Dimensions: a = 9.9758, c = 36.714, Z = 8; V = 3,653.65 Den(Calc)= 3.86
Help on Crystal System: Crystal System: Tetragonal - Trapezohedral H-M Symbol (4 2 2) Space Group: P 4122 or P 4322
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.177(1)(004 ), 4.588(0.32)(008 ), 3.059(0.15)(0.0.12),4.167(0.1)(108 ), 9.6(0.09)(101 ), 2.606(0.06)(2.0.12), 2.924(0.05)(1.0.12), 1.1471(0.04)(0.0.32), 1.3102(0.04)(2.2.26),

Physical Properties of Lemanskiite

Help on Cleavage: Cleavage: {hk0} Perfect
Help on Color: Color: Dark blue.
Help on Density: Density: 3.78
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light blue

Optical Properties of Lemanskiite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.026 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.046 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1808,KPDmeas= 0.1847,KC= 0.1895
Ncalc = 1.72 - 1.73
Help on Optical Data: Optical Data: Uniaxial (-), e=1.647, w=1.749, bire=0.1020.

Calculated Properties of Lemanskiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.58 gm/cc
note: Specific Gravity of Lemanskiite =3.78 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.000203918
Boson Index = 0.999796082
Help on Photoelectric: Photoelectric: PELemanskiite = 33.42 barns/electron
U=PELemanskiite x rElectron Density= 119.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lemanskiite is Not Radioactive

Lemanskiite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.09)where (A)3 (XO4)2 Zq � x(H2O)
  (42.09.04)Dana Group Sampleite NaCaCu5(PO4)4Cl•5(H2O) pseudo TET 2/m 2/m 2/m Lavendulan NaCaCu5(AsO4)4Cl•5(H2O) Unk Ortho Zdenekite NaPbCu5(AsO4)4Cl•5(H2O) P 4122,P 4322 4 2 2 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl•5(H2O) I 4mmm 4 2 2 Lemanskiite! NaCaCu5(AsO4)4Cl•5H2O P 4122 or P 4322 4 2 2
Help on  Strunz Class: Strunz Class: 08.DG.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DG -With large and medium-sized cations, (OH, etc.):RO4 < 0.5:1
08.DG.05 Lavendulan NaCaCu5(AsO4)4Cl•5(H2O) Unk Ortho
08.DG.05 Shubnikovite Ca2Cu8(AsO4)6Cl(OH)•7(H2O)(?) Unk Ortho
08.DG.05 Sampleite NaCaCu5(PO4)4Cl•5(H2O) pseudo TET 2/m 2/m 2/m
08.DG.05 Zinclavendulan? NaCa(Zn,Cu)5(AsO4)4Cl•4-5(H2O) Unk Ortho
08.DG.05 Lemanskiite! NaCaCu5(AsO4)4Cl•5H2O P 4122 or P 4322 4 2 2
08.DG.05 Zdenekite NaPbCu5(AsO4)4Cl•5(H2O) P 4122,P 4322 4 2 2

Other Lemanskiite Information

Help on References: References: NAME( AmMin, v91, p1947) PHYS. PROP.(AmMin, v91, p1947) OPTIC PROP.(AmMin, v91, p1947)
Help on See Also: See Also: Links to other databases for Lemanskiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 08.DG.05





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