Hopeite Mineral Data (original) (raw)
General Hopeite Information
Chemical Formula:
Zn3(PO4)2•4(H2O)
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
Empirical Formula:
Zn3(PO4)2•4(H2O)
IMA Status:
Valid Species (Pre-IMA) 1908
Locality:
Vieille Montagne (Altenberg), Moresnet, Li�ge Province, Belgium. Link to MinDat.org Location Data.
Name Origin:
Named after the Scottish chemist, Thomas Charles Hope (1766-1844).
Name Pronunciation:
Hopeite 
Synonym:
ICSD 34869
PDF 37-465
Hopeite Image
Images:
Hopeite Crystallography
Axial Ratios:
a:b:c =0.5785:1:0.2746
Cell Dimensions:
a = 10.597, b = 18.318, c = 5.031, Z = 4; V = 976.60 Den(Calc)= 3.12
Crystal System:
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma
X Ray Diffraction:
By Intensity(I/Io): 2.855(1), 4.576(0.55), 9.16(0.55),
Forms:
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| | Forms:( 0 1 0) ( 1 1 0) ( 1 3 1) ( 0 3 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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
Cleavage:
{100} Perfect, {010} Good, {001} Poor
Color:
Colorless, Gray white, Yellow, White, Light yellow.
Density:
3
Diaphaneity:
Transparent to Translucent
Fracture:
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Habit:
Encrustations - Forms crust-like aggregates on matrix.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Reniform - "Kidney like" in shape (e.g.. hematite).
Hardness:
3 - Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Magnetism:
Nonmagnetic
Streak:
white
Optical Properties of Hopeite
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
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.
Pleochroism (x):
none.
Pleochroism (y):
none.
Pleochroism (z):
none.
Calculated Properties of Hopeite
Electron Density:
Bulk Density (Electron Density)=2.93 gm/cc
note: Specific Gravity of Hopeite =3.00 gm/cc.
Fermion Index:
Fermion Index = 0.01
Boson Index = 0.99
Photoelectric:
PEHopeite = 21.64 barns/electron
U=PEHopeite x rElectron Density= 63.47 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hopeite is Not Radioactive
Hopeite Classification
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
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
References:
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
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 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST
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Ask about Hopeite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol
Print or Cut-and-Paste your Hopeite Specimen Label here :
Hopeite
Zn3(PO4)2•4(H2O)
Dana No: 40.03.04.01 Strunz No: 08.CA.30
Locality:
Notes: