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Hentschelite Mineral Data

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General Hentschelite Information

Help on Chemical  Formula: Chemical Formula: Cu++Fe+++2(PO4)2(OH)2
Help on Composition: Composition: Molecular Weight = 399.20 gm
   Iron        27.98 %  Fe   40.00 % Fe2O3
   Copper      15.92 %  Cu   19.93 % CuO
   Phosphorus  15.52 %  P    35.56 % P2O5
   Hydrogen     0.50 %  H     4.51 % H2O
   Oxygen      40.08 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CuFe3+2(PO4)2(OH)2
Help on Environment: Environment: Secondary mineral in some oxidized copper deposits.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Reichenbach, near Bensheim, Hesse, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Gerhard Hentschel (1930- ), Geological Survey of Hesse, Wiesbaden, Germany.
Help on Name Pronunciation: Name Pronunciation: Hentschelite + Pronunciation Say HENTSCHELITE
Help on Synonym: Synonym: Andrewsite
  ICSD 62242
  PDF 40-501

Hentschelite Image

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Comments: Dark green botryoidal hentschelite in transparent quartz.
Location: Spring Creek Mine, near Wilmington, South Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hentschelite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8969:1:0.9332
Help on Cell Dimensions: Cell Dimensions: a = 6.984, b = 7.786, c = 7.266, Z = 2; beta = 117.68° V = 349.89 Den(Calc)= 3.79
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.33(1), 3.27(0.5), 4.81(0.5),

Physical Properties of Hentschelite

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark green.
Help on Density: Density: 3.79
Help on Diaphaneity: Diaphaneity: Translucent
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light green

Optical Properties of Hentschelite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2318,KPDmeas= 0.2318,KC= 0.2403
Ncalc = 1.91
Help on Optical Data: Optical Data: Biaxial (+), a=1.843, b=1.848, g=1.945, bire=0.1020, 2V(Calc)=28, 2V(Meas)=60-70.

Calculated Properties of Hentschelite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.66 gm/cc
note: Specific Gravity of Hentschelite =3.79 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0061248201
Boson Index = 0.9938751799
Help on Photoelectric: Photoelectric: PEHentschelite = 16.12 barns/electron
U=PEHentschelite x rElectron Density= 59.08 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hentschelite is Not Radioactive

Hentschelite Classification

Help on  Dana Class: Dana Class: (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.10)where (A++ B++)3 (XO4)2 Zq
  (41.10.01)Lazulite Group Lazulite MgAl2(PO4)2(OH)2 P 21/c 2/m Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m Hentschelite CuFe2(PO4)2(OH)2 P 21/n 2/m Barbosalite FeFe2(PO4)2(OH)2 P 21/c 2/m
Help on  Strunz Class: Strunz Class: 08.BB.40 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BB -With only medium-sized cations, (OH, etc.):RO4 � 1:1
08.BB.40 Barbosalite FeFe2(PO4)2(OH)2 P 21/c 2/m
08.BB.40 Wilhelmkleinite! ZnFe3(AsO4)2(OH)2 P 21/n 2/m
08.BB.40 Hentschelite CuFe2(PO4)2(OH)2 P 21/n 2/m
08.BB.40 Lazulite MgAl2(PO4)2(OH)2 P 21/c 2/m
08.BB.40 Scorzalite (Fe,Mg)Al2(PO4)2(OH)2 P 2/c 2/m

Other Hentschelite Information

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.72,p404-408,1987) OPTIC PROP.(Am.Min.,Vol.72,p404-408,1987)
Help on See Also: See Also: Links to other databases for Hentschelite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 08.BB.40





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