Skorpionite Mineral Data
General Skorpionite Information
Chemical Formula:
Ca3Zn2(PO4)2CO3(OH)2•H2O
Composition:
Molecular Weight = 552.09 gm
Calcium 22.14 % Ca 30.98 % CaO
Zinc 23.21 % Zn 28.89 % ZnO
Phosphorus 11.16 % P 25.58 % P2 O5
Hydrogen 0.73 % H 6.56 % H2 O
Carbon 2.18 % C 7.97 % CO2
Oxygen 40.57 % O
______ ______
100.00 % 99.99 % = TOTAL OXIDE
Empirical Formula:
Ca3.05 Zn1.96 (PO4 )1.99 (CO3 )(OH)2.06 •0.98(H2 O)
Environment:
Secondary mineral in zinc mine. New structure type.
IMA Status:
Approved IMA 2005 (Dana # Added)
Locality:
Skorpion zinc deposit, Namibia Link to MinDat.org Location Data.
Name Origin:
Named after the locality.
Synonym:
IMA2005-010
Skorpionite Crystallography
Axial Ratios:
a:b:c =2.0434:1:0.7001
Cell Dimensions:
a = 19.045, b = 9.32, c = 6.525, Z = 4; beta = 92.73° V = 1,156.87 Den(Calc)= 3.17
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io ): 3.17(1), 2.788(0.67), 9.501(0.53), 3.063(0.42), 5.32(0.3), 2.26(0.21), 2.582(0.21),
Physical Properties of Skorpionite
Color:
White, Colorless.
Density:
3.15
Diaphaneity:
Transparent
Habit:
Acicular - Occurs as needle-like crystals.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Skorpionite
Gladstone-Dale:
CI meas = -0.011 (Superior) - where the CI = (1-KPDmeas /KC ) CI calc = -0.004 (Superior) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.1975,KPDmeas = 0.1988,KC = 0.1966 Ncalc = 1.62
Optical Data:
Biaxial (-), a=1.5884, b=1.6445, g=1.6455, bire=0.0571
Calculated Properties of Skorpionite
Electron Density:
Bulk Density (Electron Density)=3.12 gm/cc note: Specific Gravity of Skorpionite =3.17 gm/cc.
Fermion Index:
Fermion Index = 0.01 Boson Index = 0.99
Photoelectric:
PESkorpionite = 14.61 barns/electronU=PESkorpionite x r Electron Density= 45.58 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Skorpionite is Not Radioactive
Skorpionite Classification
Dana Class:
43.05.24.01 (43) Compound Phosphates, etc.
(43.05) (Hydrated Compound Anions With Hydroxyl or Halogen)
(43.05.24) Dana Group
43.05.24.01 Skorpionite ! Ca3Zn2(PO4)2CO3(OH)2•H2O C 2/c 2/m
Strunz Class:
08.DO.45 08 - PHOSPHATES, ARSENATES, VANADATES
08.D - Phosphates, etc
08.DO -With CO3, SO4, SiO4
08.DO.45 Skorpionite ! Ca3Zn2(PO4)2CO3(OH)2•H2O C 2/c 2/m
Other Skorpionite Information
References:
NAME( AmMin, v94:403) PHYS. PROP.(AmMin, v94:403) OPTIC PROP.(AmMin, v94:403)
See Also:
Links to other databases for Skorpionite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Skorpionite
Ca3Zn2(PO4)2CO3(OH)2•H2O
Dana No: 43.05.24.01 Strunz No: 08.DO.45
Locality:
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