Mineralogy Database

Ehrleite Mineral Data

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General Ehrleite Information

Help on Chemical  Formula: Chemical Formula: Ca2ZnBe(PO4)2(PO3,OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 480.04 gm
   Calcium     16.70 %  Ca   23.36 % CaO
   Beryllium    1.88 %  Be    5.21 % BeO
   Zinc        13.62 %  Zn   16.95 % ZnO
   Phosphorus  17.74 %  P    40.66 % P2O5
   Hydrogen     1.73 %  H    15.48 % H2O
   Oxygen      48.33 %  O
              ______        ______ 
              100.00 %      101.67 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2ZnBe(PO4)2(PO3)0.75(OH)0.25•4(H2O)
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Tip Top mine, Custer County, South Dakota. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Howard Ehrle of Miles City, Montana, who found the mineral.
Help on Name Pronunciation: Name Pronunciation: Ehrleite Say EHRLEITE
Help on Synonym: Synonym: ICSD 202481
  PDF 38-402

Ehrleite Image

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  Ehrleite   Parascholzite

Comments: White to clear, slender, 1-2mm, thin platy crystals of ehrleite associated with slender or thin,long bladed parascholzite. Type specimen courtesy of Museum of Geology, SD School of Mines.
Location: Tip Top mine, Custer County, South Dakota, USA. Scale: Crystal size 1-2 mm.
© Tom Loomis / Dakota Matrix

Ehrleite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9596:1:1.6795
Help on Cell Dimensions: Cell Dimensions: a = 7.13, b = 7.43, c = 12.479, Z = 2; alpha = 94.31°, beta = 102.07°, gamma = 82.65° V = 639.35 Den(Calc)= 2.49
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.16(1), 12.41(0.7), 2.723(0.6),

Physical Properties of Ehrleite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.64
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Ehrleite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.054 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.227,KPDmeas= 0.2141,KC= 0.2154
Ncalc = 1.54 - 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.556, b=1.56, g=1.58, bire=0.0240, 2V(Calc)=50, 2V(Meas)=62.

Calculated Properties of Ehrleite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.63 gm/cc
note: Specific Gravity of Ehrleite =2.64 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEEhrleite = 9.48 barns/electron
U=PEEhrleite x rElectron Density= 24.97 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ehrleite is Not Radioactive

Ehrleite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.05)with miscellaneous formulae
  (40.05.06)Dana Group Ehrleite Ca2ZnBe(PO4)2(PO3,OH)•4(H2O) P1 1
Help on  Strunz Class: Strunz Class: 08.CA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CA -With small and large/medium cations
08.CA.10 Ehrleite Ca2ZnBe(PO4)2(PO3,OH)•4(H2O) P1 1

Other Ehrleite 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 Ehrleite :
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.CA.10





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