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Mahnertite Mineral Data

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General Mahnertite Information

Help on Chemical  Formula: Chemical Formula: (Na,Ca)Cu++3(AsO4)2Cl•5(H2O)
Help on Composition: Composition: Molecular Weight = 565.01 gm
   Sodium     3.58 %  Na    4.83 % Na2O
   Calcium    0.85 %  Ca    1.19 % CaO
   Copper    30.93 %  Cu   38.72 % CuO
   Arsenic   26.52 %  As   40.68 % As2O5
   Hydrogen   1.30 %  H    11.57 % H2O
   Chlorine   3.89 %  Cl    3.89 % Cl
               -   %   Cl   -0.88 % -O=Cl2   
   Oxygen    32.93 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na0.88Ca0.12Cu2.75(AsO4)2Cl0.62•3.63(H2O)
Help on Environment: Environment: Found in a zone of secondary alteration. Polytype of zdenekite.
Help on IMA Status: IMA Status: Approved IMA 1995 (Dana # Added)
Help on Locality: Locality: Cap Garonne mine, Var, France. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after Volker Mahnert (b. 1943), zoologist, director of the Museum d�Histoire Naturelle, Geneva, Switzerland.
Help on Name Pronunciation: Name Pronunciation: Mahnertite + Pronunciation Say MAHNERTITE
Help on Synonym: Synonym: IMA1994-035
 

Mahnertite Image

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  Mahnertite

Comments: Blue mahnertite in quartz.
Location: Cap Garonne Mine, Pradet, Var, Provence-Alpes-Côte d'Azur, France. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Mahnertite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.36512
Help on Cell Dimensions: Cell Dimensions: a = 10.0371, c = 23.739, Z = 8; V = 2,391.55 Den(Calc)= 3.14
Help on Crystal System: Crystal System: Tetragonal - Trapezohedral H-M Symbol (4 2 2) Space Group: I 4mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 11.9(1), 3.098(0.8), 3.061(0.7),
 

Physical Properties of Mahnertite

Help on Color: Color: Blue, Emerald green.
Help on Density: Density: 3.14
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 2-3 - Gypsum-Calcite
Help on Luster: Luster: Vitreous (Glassy)
 

Optical Properties of Mahnertite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.079 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.079 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2104,KPDmeas= 0.2104,KC= 0.195
Ncalc = 1.61
Help on Optical Data: Optical Data: Uniaxial (-), e=1.635, w=1.686, bire=0.0510.
 

Calculated Properties of Mahnertite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.99 gm/cc
note: Specific Gravity of Mahnertite =3.14 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0001715119
Boson Index = 0.9998284881
Help on Photoelectric: Photoelectric: PEMahnertite = 32.21 barns/electron
U=PEMahnertite x rElectron Density= 96.19 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mahnertite is Not Radioactive
 

Mahnertite Classification

Help on  Dana Class: Dana Class: 42.09.04.04 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.09)where (A)3 (XO4)2 Zq � x(H2O)
  (42.09.04)Dana Group
 
42.09.04.01 Sampleite NaCaCu5(PO4)4Cl•5(H2O) pseudo TET 2/m 2/m 2/m
 
42.09.04.02 Lavendulan NaCaCu5(AsO4)4Cl•5(H2O) Unk Ortho
 
42.09.04.03 Zdenekite NaPbCu5(AsO4)4Cl•5(H2O) P 4122,P 4322 4 2 2
 
42.09.04.04 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl•5(H2O) I 4mmm 4 2 2
 
42.09.04.05 Lemanskiite! NaCaCu5(AsO4)4Cl•5H2O P 4122 or P 4322 4 2 2
Help on  Strunz Class: Strunz Class: 08.DH.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
 
08.DH.45 Mahnertite! (Na,Ca)Cu3(AsO4)2Cl•5(H2O) I 4mmm 4 2 2
 

Other Mahnertite Information

Help on References: References: NAME( CanMin, 8/99) PHYS. PROP.(Am.Min, 82:1262, 90:772) OPTIC PROP.(Am.Min.,Vol.82,p1262,1997)
Help on See Also: See Also: Links to other databases for Mahnertite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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Mahnertite

(Na,Ca)Cu++3(AsO4)2Cl•5(H2O)
Dana No: 42.09.04.04 Strunz No: 08.DH.45
Locality:

 

Notes:

 

 
   
 


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