Parahopeite Mineral Data

General Parahopeite 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:

Kabwe (Broken Hill), Central province, Zambia Link to MinDat.org Location Data.

Name Origin:

Named for it's dimorphic relationship to hopeite.

Name Pronunciation:

Parahopeite + Pronunciation

Synonym:

ICSD 16979

PDF 39-1352

Parahopeite Image

Images:

Parahopeite

Comments: Transparent, prismatic parahopeite crystals with keckite.
Location: Hagendorf, Bavaria, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Parahopeite Crystallography

Axial Ratios:

a:b:c =0.7625:1:0.6993

Cell Dimensions:

a = 5.755, b = 7.547, c = 5.278, Z = 1; alpha = 93.35°, beta = 91.18°, gamma = 91.42° V = 228.73 Den(Calc)= 3.33

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 7.56(1), 2.99(0.9), 4.48(0.7),

Forms:

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Forms: ( 1 1 1) ( 0 1 1) ( 0 1 0) ( 3 2 2) ( 1 1 1) ( 1 1 0) ( 0 1 1) ( 1 0 0) ( 0 0 1)

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Physical Properties of Parahopeite

Cleavage:

{???} Distinct

Color:

Colorless.

Density:

3.3

Diaphaneity:

Transparent

Habit:

Striated - Parallel lines on crystal surface or cleavage face.

Hardness:

3.5 - Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Parahopeite

Gladstone-Dale:

CI meas= 0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1878,KPDmeas= 0.1895,KC= 0.1944
Ncalc = 1.64 - 1.65

Optical Data:

Biaxial (+), a=1.614, b=1.625, g=1.637, bire=0.0230

Calculated Properties of Parahopeite

Electron Density:

Bulk Density (Electron Density)=3.23 gm/cc
note: Specific Gravity of Parahopeite =3.30 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Parahopeite= 21.64 barns/electron
U=PE_Parahopeite x rElectron Density= 69.82 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Parahopeite is Not Radioactive

Parahopeite Classification

Dana Class:

40.03.03.01 (40)Hydrated Phosphates, etc

(40.03)where (A++)3 (XO4)2 ï¿½ x(H2O)

(40.03.03)Dana Group

40.03.03.01 Parahopeite Zn3(PO4)2•4(H2O) P1 1

Strunz Class:

08.CA.70 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CA -With small and large/medium cations

08.CA.70 Parahopeite Zn3(PO4)2•4(H2O) P1 1

Other Parahopeite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Parahopeite :
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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Parahopeite Specimen Label here :

Parahopeite

Zn3(PO4)2•4(H2O)
Dana No: 40.03.03.01 Strunz No: 08.CA.70
Locality:

Notes:

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