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Skorpionite

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About SkorpioniteHide

Formula:
Ca3Zn2(PO4)2(CO3)(OH)2 · H2O
Colour:
colourless
Lustre:
Vitreous
Hardness:
Specific Gravity:
3.15
Crystal System:
Monoclinic
Name:
For the type locality at the Skorpion Mine, Rosh Pinah, Lüderitz District, Karas Region, Namibia.
May be confused with sword-shaped crystals of scholzite.


Classification of SkorpioniteHide

Approved
Approval Year:
2005
8.DO.45

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
O : With CO3, SO4, SiO4
43.5.20.

43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen

Physical Properties of SkorpioniteHide

Vitreous
Transparency:
Transparent
Colour:
colourless
Streak:
white
Hardness:
3½ on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
3.15(3) g/cm3 (Measured)    3.17 g/cm3 (Calculated)

Optical Data of SkorpioniteHide

Type:
Biaxial (-)
RI values:
nα = 1.588(10) nβ = 1.645 nγ = 1.646(10)
2V:
Measured: 15.0° (5)
Max Birefringence:
δ = 0.057
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of SkorpioniteHide

Formula:
Ca3Zn2(PO4)2(CO3)(OH)2 · H2O

Crystallography of SkorpioniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 19.042(2) Å, b = 9.309(1) Å, c = 6.519(1) Å
β = 92.72(1)°
Ratio:
a:b:c = 2.046 : 1 : 0.7
Unit Cell V:
1154.3 ų
Z:
4
Morphology:
Bladed, sword-shaped.
Comment:
refined from X-ray powder data

Type Occurrence of SkorpioniteHide

General Appearance of Type Material:
colourless needle-like crystals elongated parallel to [001]
Place of Conservation of Type Material:
Mineralogical Institute, University of Bochum, Germany
Associated Minerals at Type Locality:

Synonyms of SkorpioniteHide

Other Language Names for SkorpioniteHide

German:Skorpionit
Simplified Chinese:水羟碳磷锌钙石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Tarbuttite20 photos of Skorpionite associated with Tarbuttite on mindat.org.
Stolzite3 photos of Skorpionite associated with Stolzite on mindat.org.
Hydrozincite1 photo of Skorpionite associated with Hydrozincite on mindat.org.
Hemimorphite1 photo of Skorpionite associated with Hemimorphite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DO.05GirvasiteNaCa2Mg3(PO4)3(CO3)(H2O)6Mon. 2/m : P21/b
8.DO.10VoggiteNa2Zr(PO4)(CO3)(OH) · 2H2OMon.
8.DO.15PeisleyiteNa2Al9[(P,S)O4]8(OH)6•28H2OTric. 1 : P1
8.DO.20PerhamiteCa3Al7.7Si3P4O23.5(OH)14.1 · 8H2OTrig. 3m (3 2/m) : P3m1
8.DO.20KrásnoiteCa3Al7.7Si3P4O23.5(OH)12.1F2 · 8H2OTrig. 3m (3 2/m) : P3m1
8.DO.25Saryarkite-(Y)Ca(Y,Th)Al5(SiO4)2(PO4,SO4)2(OH)7 · 6H2OTet. 4 2 2
8.DO.30Micheelsenite(Ca,Y)3Al(HPO4,CO3)(CO3)(OH)6 · 12H2OHex.
8.DO.40Parwanite(Na,K)(Mg,Ca)4Al8(PO4)8(CO3)(OH)7 · 30H2OMon. 2 : P2

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for SkorpioniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Borg, G., Karner, K., Buxton, M., Armstrong, R., Schalk van der Merwe, W. (2003) Geology of the Skorpion supergene zinc deposit, southern Namibia. Economic Geology, 98, 749-771.
Jahn, S. (2007) Tarbuttit von der Skorpion Zink Mine, Namibia. Mineralien-Welt 18 (4), 56-66. (in German)
Krause, W., et al. (2008) Skorpionite, a new mineral from Namibia: description and crystal structure. Eur. J. Mineralogy 20, 271-280.

Internet Links for SkorpioniteHide

Localities for SkorpioniteHide

ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Namibia (TL)
 
  • Karas Region
    • Lüderitz District
      • Rosh Pinah
Krause, W., et al.: "Skorpionite, a new mineral from Namibia: description and crystal structure", Eur. J. Mineralogy 20, 271-280 (2008); Borg, G., Karner, K., Buxton, M., Armstrong, R., Schalk van der Merwe, W. (2003): Geology of the Skorpion supergene zinc deposit, southern Namibia. Economic Geology, 98, 749-771.; Jahn, S. (2007): Tarbuttit von der Skorpion Zink Mine, Namibia. Mineralien-Welt 18 (4), 56-66. (in German)
Mineral and/or Locality  
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