Scholzite Mineral Data

Scholzite Mineral Data +

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General Scholzite Information

Chemical Formula:

CaZn2(PO4)2·2(H2O)

Composition:

Molecular Weight = 396.83 gm

Calcium 10.10 % Ca 14.13 % CaO

Zinc 32.96 % Zn 41.02 % ZnO

Phosphorus 15.61 % P 35.77 % P₂O₅

Hydrogen 1.02 % H 9.08 % H₂O

Oxygen 40.32 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaZn₂(PO₄)₂·2(H₂O)

Environment:

Dimorphous with parascholzite.

IMA Status:

Valid Species (Pre-IMA) 1950

Locality:

Hagendorf, Bavaria, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Adolph Scholz (1894-1950), mineral collector and chemist, Regensburg, Germany.

Synonym:

ICSD 4270

PDF 27-95

Scholzite Image

Images:

Scholzite

Comments: Sprays of Scholzite crystals to 1 cm line exposed vugs.
Location: Reaphook Hill, Blinman, South Australia. Scale: Picture size 1 cm.
© John Veevaert

Images:

Scholzite Hillite

Comments: Morphology of a homogeneous larger cluster of hillite growing on an acicular crystal of scholzite. SEM back-scattered electron image.
Location: Lower Cambrian Parachilna Formation, Reaphook Hill, South Australia, Australia. Scale: See Image.
© Canadian Mineralogist

Scholzite Crystallography

Axial Ratios:

a:b:c =0.7724:1:0.2978

Cell Dimensions:

a = 17.14, b = 22.19, c = 6.61, Z = 12; V = 2,514.03 Den(Calc)= 3.15

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbmm

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

By Intensity(I/I_o): 8.588(1), 2.788(0.9), 4.23(0.7),

Crystal Structure:

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Taxer K J , American Mineralogist , 60 (1975) p.1019-1022, Structural investigations on scholzite

View Additional jPOWD Structure files for Scholzite
[1] [2]

Physical Properties of Scholzite

Cleavage:

[100] Parting

Color:

Colorless, Gray white, White.

Density:

3.11

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Scholzite

Gladstone-Dale:

CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1866,KPDmeas= 0.189,KC= 0.1908

Optical Data:

Biaxial (+), a=1.581, b=1.586, g=1.596, bire=0.0150, 2V(Calc)=72, 2V(Meas)=70. Dispersion r > v.

Calculated Properties of Scholzite

Electron Density:

r_electron=3.04 gm/cc
note: r_Scholzite=3.11 gm/cc.

Fermion Index

Fermion Index = 0.01384
Boson Index = 0.98616

Photoelectric:

PE_Scholzite= 18.16 barns/electron
U=PE_Scholzite x r_electron= 55.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Scholzite is Not Radioactive

Scholzite Classification

Dana Class:

40.2.6.1 (40)Hydrated Phosphates, etc

(40.2)where A++ (B++)2 (XO4) · x(H2O)

(40.2.6)Dana Group

40.2.6.1 Scholzite CaZn2(PO4)2·2(H2O) Pbmm 2/m 2/m 2/m

Strunz Class:

VII/C.16-20 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions, cations of medium and big size: Fe, Mn, Zn, Mg and Ca, (NH4)1+

VII/C.16 - Parascholzite - Fluckite series

VII/C.16-10 Parascholzite CaZn2(PO4)2·2(H2O) C 2/c or Cc Mono

VII/C.16-20 Scholzite CaZn2(PO4)2·2(H2O) Pbmm 2/m 2/m 2/m

VII/C.16-30 Fluckite CaMn(HAsO4)2·2(H2O) P1 1

Other Scholzite Information

References:

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

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Scholzite

CaZn2(PO4)2·2(H2O)
Dana No: 40.2.6.1 Strunz No: VII/C.16-20
Locality:

Notes: