Parascholzite Mineral Data

Parascholzite Mineral Data +

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General Parascholzite 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:

Found in association with scholzite.

IMA Status:

Approved IMA 1981

Locality:

Hagendorf Sud and Nord, Bavaria, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for its dimorphic relationship to scholzite.

Synonym:

ICSD 40146

PDF 35-495

Parascholzite Image

Images:

Click Here for Larger Parascholzite Image

Parascholzite Ehrleite

Comments: White to clear, slender, 1-2mm, prismatic crystals of ehrleite associated with massive 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

Images:

Parascholzite

Comments: Bluish, transparent, prismatic parascholzite crystals on matrix.
Location: Hagendorf, Bavaria, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Parascholzite Crystallography

Axial Ratios:

a:b:c =2.4068:1:0.8992

Cell Dimensions:

a = 17.864, b = 7.422, c = 6.674, Z = 4; beta = 106.45° V = 848.66 Den(Calc)= 3.11

Crystal System:

MonoclinicSpace Group: C 2/c or Cc

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

By Intensity(I/I_o): 8.55(1), 2.804(0.8), 4.158(0.5),

Crystal Structure:

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Taxer K J , Zeitschrift fur Kristallographie , 198 (1992) p.239-253, Order-disorder and polymorphism of the compound, with the composition of scholzite, CaZn2[PO4]2*2H2O, Note: hypothetical idealized structure, Note: x(O2) corrected

Physical Properties of Parascholzite

Cleavage:

[100] Parting

Color:

Colorless, White.

Density:

3.12

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Parascholzite

Gladstone-Dale:

CI meas= 0.004 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1906,KPDmeas= 0.19,KC= 0.1908

Optical Data:

Biaxial (+), a=1.587, b=1.588, g=1.603, bire=0.0160, 2V(Calc)=30, 2V(Meas)=25. Dispersion r > v.

Calculated Properties of Parascholzite

Electron Density:

r_electron=3.04 gm/cc
note: r_{Parascholzite}=3.11 gm/cc.

Fermion Index

Fermion Index = 0.01384
Boson Index = 0.98616

Photoelectric:

PE_{Parascholzite}= 18.16 barns/electron
U=PE_{Parascholzite} x r_electron= 55.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Parascholzite is Not Radioactive

Parascholzite Classification

Dana Class:

40.2.5.1 (40)Hydrated Phosphates, etc

(40.2)where A++ (B++)2 (XO4) · x(H2O)

(40.2.5)Dana Group

40.2.5.1 Parascholzite CaZn2(PO4)2·2(H2O) C 2/c or Cc Mono

Strunz Class:

VII/C.16-10 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 Parascholzite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Parascholzite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Parascholzite

CaZn2(PO4)2·2(H2O)
Dana No: 40.2.5.1 Strunz No: VII/C.16-10
Locality:

Notes: