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Lavendulan Mineral Data

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General Lavendulan Information

Help on Chemical  Formula: Chemical Formula: NaCaCu5(AsO4)4Cl•5(H2O)
Help on Composition: Composition: Molecular Weight = 1,062.00 gm
   Sodium     2.16 %  Na    2.92 % Na2O
   Calcium    3.77 %  Ca    5.28 % CaO
   Copper    29.92 %  Cu   37.45 % CuO
   Arsenic   28.22 %  As   43.28 % As2O5
   Hydrogen   0.95 %  H     8.48 % H2O
   Chlorine   3.34 %  Cl    3.34 % Cl
               -   %   Cl   -0.75 % -O=Cl2   
   Oxygen    31.64 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: NaCaCu5(AsO4)4Cl•5(H2O)
Help on Environment: Environment: Secondary mineral in Cu-As deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1837
Help on Locality: Locality: Jachimov, Bohemia, Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the color (lavender blue).
Help on Name Pronunciation: Name Pronunciation: Lavendulan + Pronunciation Say LAVENDULAN
Help on Synonym: Synonym: Zinclavendulan

Lavendulan Image

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Comments: Bright blue crystals of Lavendulan crystals.
Location: Gold Hill mine, Deep Creek Mountains, Tooele County, Utah, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Lavendulan Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.2429:1:0.2473
Help on Cell Dimensions: Cell Dimensions: a = 9.815, b = 40.394, c = 9.99, Z = 8; V = 3,960.71 Den(Calc)= 3.56
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.77(1), 3.11(0.7), 4.87(0.5),

Physical Properties of Lavendulan

Help on Cleavage: Cleavage: {010} Perfect, {110} Indistinct
Help on Color: Color: Blue, Lavender blue, Greenish blue.
Help on Density: Density: 3.54
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous - Waxy
Help on Streak: Streak: light blue

Optical Properties of Lavendulan

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.046 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1975,KPDmeas= 0.1986,KC= 0.1898
Ncalc = 1.67 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.66, b=1.715, g=1.734, bire=0.0740, 2V(Calc)=58, 2V(Meas)=33.

Calculated Properties of Lavendulan

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.37 gm/cc
note: Specific Gravity of Lavendulan =3.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002042283
Boson Index = 0.9997957717
Help on Photoelectric: Photoelectric: PELavendulan = 33.35 barns/electron
U=PELavendulan x rElectron Density= 112.48 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lavendulan is Not Radioactive

Lavendulan 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 Lavendulan Information

Help on References: References: NAME( Dana8) 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 Lavendulan :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 08.DG.05





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