Hopeite Mineral Data

Hopeite Mineral Data
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General Hopeite Information

Help on Chemical Formula: Chemical Formula: Zn3(PO4)2•4(H2O)
Help on Composition: Composition: Molecular Weight = 458.17 gm
   Zinc        42.82 %  Zn   53.29 % ZnO
   Phosphorus  13.52 %  P    30.98 % P2O5
   Hydrogen     1.76 %  H    15.73 % H2O
   Oxygen      41.90 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn3(PO4)2•4(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1908
Help on Locality: Locality: Vieille Montagne (Altenberg), Moresnet, Ličge Province, Belgium. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the Scottish chemist, Thomas Charles Hope (1766-1844).
Help on Name Pronunciation: Name Pronunciation: Hopeite Say HOPEITE
Help on Synonym: Synonym: ICSD 34869
  PDF 37-465
 

Hopeite Image

Click Here for Larger Hopeite Image in a New Browser Window Images:
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Hopeite

Comments: Brownish pink, transparent crystalline aggregate of hopeite crystals.
Location: Broken Hill mine, Kabwe, Central, Zambia. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Hopeite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5785:1:0.2746
Help on Cell Dimensions: Cell Dimensions: a = 10.597, b = 18.318, c = 5.031, Z = 4; V = 976.60 Den(Calc)= 3.12
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.855(1), 4.576(0.55), 9.16(0.55),
Help on Forms: Forms:

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Forms: ( 0 1 0) ( 1 1 0) ( 1 3 1) ( 0 3 1)

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Click Here for Large Hopeite Structure Window Crystal Structure:

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Hill R J , Jones J B , American Mineralogist , 61 (1976) p.987-995, The crystal structure of hopeite

 

Physical Properties of Hopeite

Help on Cleavage: Cleavage: {100} Perfect, {010} Good, {001} Poor
Help on Color: Color: Colorless, Gray white, Yellow, White, Light yellow.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Habit: Habit: Reniform - "Kidney like" in shape (e.g.. hematite).
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Hopeite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.187,KPDmeas= 0.1945,KC= 0.1944
Ncalc = 1.58 - 1.61
Help on Optical Data: Optical Data: Biaxial (-), a=1.572-1.574, b=1.582-1.591, g=1.59-1.592, bire=0.0180, 2V(Calc)=26-82, 2V(Meas)=0-36. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.
 

Calculated Properties of Hopeite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Hopeite =3.00 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHopeite = 21.64 barns/electron
U=PEHopeite x rElectron Density= 63.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hopeite is Not Radioactive
 

Hopeite Classification
Help on Dana Class: Dana Class: 40.03.04.01 (40)Hydrated Phosphates, etc
  (40.03)where (A++)3 (XO4)2 · x(H2O)
  (40.03.04)Hopeite Group
 
40.03.04.01 Hopeite Zn3(PO4)2•4(H2O) P nma 2/m 2/m 2/m
 
40.03.04.02 Rollandite! Cu3(AsO4)2•4(H2O) P nma 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: 08.CA.30 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CA -With small and large/medium cations
 
08.CA.30 Hopeite Zn3(PO4)2•4(H2O) P nma 2/m 2/m 2/m
 

Other Hopeite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Hopeite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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Hopeite

Zn3(PO4)2•4(H2O)
Dana No: 40.03.04.01 Strunz No: 08.CA.30
Locality:

 

Notes: