Isoclasite Mineral Data

General Isoclasite Information

Chemical Formula:

Ca2(PO4)(OH)•2(H2O) (?)

Composition:

Molecular Weight = 228.17 gm

Calcium 35.13 % Ca 49.16 % CaO

Phosphorus 13.58 % P 31.11 % P₂O₅

Hydrogen 2.21 % H 19.74 % H₂O

Oxygen 49.09 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₂(PO₄)(OH)•2(H₂O)

Environment:

Found with chalcedony and dolomite. An inadequately described species.

IMA Status:

Valid Species (Pre-IMA) 1870

Locality:

Jachymov, Zapadocesky Kraj, Bohemia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named from the Greek for "equal" and "fracture", in allusion to the cleavage.

Name Pronunciation:

Isoclasite + Pronunciation

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Isoclasite Crystallography

Crystal System:

Monoclinic

Physical Properties of Isoclasite

Cleavage:

{010} Distinct

Color:

Colorless, White.

Density:

2.92

Diaphaneity:

Transparent to Translucent

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

1.5 - Between Talc and Gypsum

Luster:

Vitreous - Pearly

Optical Properties of Isoclasite

Gladstone-Dale:

CI meas= 0.14 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1955,KC= 0.2273
Ncalc = 1.66

Optical Data:

Biaxial (+), a=1.565, b=1.568, g=1.58, bire=0.0150, 2V(Calc)=54, 2V(Meas)=medium.

Calculated Properties of Isoclasite

Electron Density:

Bulk Density (Electron Density)=2.97 gm/cc
note: Specific Gravity of Isoclasite =2.92 gm/cc.

Fermion Index:

Fermion Index = 0.0007131872
Boson Index = 0.9992868128

Photoelectric:

PE_Isoclasite= 4.93 barns/electron
U=PE_Isoclasite x rElectron Density= 14.64 barns/cc.

Radioactivity:

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

Isoclasite Classification

Dana Class:

42.06.02.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.06)where (AB)2 (XO4) Zq · x(H2O)

(42.06.02)Dana Group

42.06.02.01 Isoclasite Ca2(PO4)(OH)•2(H2O)(?) Mono

Strunz Class:

08.DN.10 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DN -With only large cations

08.DN.10 Isoclasite Ca2(PO4)(OH)•2(H2O)(?) Mono

Other Isoclasite Information

References:

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

See Also:

Links to other databases for Isoclasite :
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 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Isoclasite

Ca2(PO4)(OH)•2(H2O) (?)
Dana No: 42.06.02.01 Strunz No: 08.DN.10
Locality:

Notes: