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Kolitschite

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Uwe Kolitsch
Formula:
PbZn0.5Fe3(AsO4)2(OH)6
System:
Monoclinic
Colour:
yellowish green
Hardness:
4
Name:
Kolitschite is named for Dr Uwe Kolitsch (b. 1966), Curator of Mineralogy at the Natural History Museum, Vienna, Austria, to recognise his contribution to mineralogy — in particular to the characterisation of new minerals (of which he has been involved in ~30) and crystallography, whilst also recognising his work on alunite-group minerals.
Related to minerals of the Dussertite Group (Alunite Supergroup), especially zincian kintoreite and segnitite.

The crystal structure differs from those of other alunite-type minerals in having zinc atoms ordered in trigonal bipyramidal sites in half of the available six-membered rings of the layers of octahedra. These sites are unoccupied in previously reported alunite-type structures. The ordering results in monoclinic symmetry and multiple twinning by 120° rotations about c*.

A solid-solution series extends between Pb[Zn0.25,□0.75]Fe3H(AsO4)2(OH)6 and the endmember Pb[Zn0.5,□0.5]Fe3(AsO4)2(OH)6.

Classification of Kolitschite

Approved 2008
8.BM.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
M : With medium-sized and large cations, (OH, etc.):RO4 = 4:1
42.7.4.8

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
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http://www.mindat.org/min-38994.html
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First Recorded Occurrence of Kolitschite

Place of Conservation of First Recorded Material:
Museum Victoria
Year of Discovery:
1991
Associated Minerals at First Recorded Locality:

Physical Properties of Kolitschite

Adamantine
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
yellowish green
Streak:
light yellow
Hardness (Mohs):
4
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.674 g/cm3 (Calculated)

Crystallography of Kolitschite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 25.8898(6) Å, b = 14.8753(2) Å, c = 12.1700(2) Å
β = 110.681(1)°
Ratio:
a:b:c = 1.74 : 1 : 0.818
Unit Cell Volume:
V 4384.9 ų
Z:
16
Morphology:
{110} (prism) and {001} (pinacoid)
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.114 (100)
6.034 (45)
2.280 (37)
3.719 (31)
2.844 (25)

Optical Data of Kolitschite

Type:
Biaxial (+)
Pleochroism:
Weak
Comments:
X = green to olive green, Y = green to olive green, Z = yellowish green to apple green.

Chemical Properties of Kolitschite

Formula:
PbZn0.5Fe3(AsO4)2(OH)6
Essential elements:
All elements listed in formula:

Relationship of Kolitschite to other Species

Structurally related to group(s):
8.BM.05Retzian-(Ce)Mn22+Ce(AsO4)(OH)4
8.BM.05Retzian-(La)(Mn2+,Mg)2(La,Ce,Nd)(AsO4)(OH)4
8.BM.05Retzian-(Nd)Mn22+(Nd,Ce,La)(AsO4)(OH)4
8.BM.10Paulkellerite(BiO)2Fe3+(PO4)(OH)2
8.BM.15Brendelite(Bi3+,Pb)2(Fe3+,Fe2+)(PO4)O2(OH)

Other Names for Kolitschite

Name in Other Languages:
German:Kolitschit
Spanish:Kolitschita

Other Information

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 Kolitschite

Reference List:
Grey, I. E., Mumme, W. G., Bordet, P. & Mills, S. J. (2008): A new crystal-chemical variation of the alunite-type structure in monoclinic PbZn0.5Fe3(AsO4)2(OH)6. Canadian Mineralogist, 46(5), 1355–1364.

Mills, S. J., Grey, I. E., Mumme, W. G., Miyawaki, R., Matsubara, S., Bordet, P., Birch, W. D. & Raudsepp, M. (2008): Kolitschite, Pb[Zn0.5,□0.5]Fe3(AsO4)2(OH)6, a new mineral from the Kintore opencut, Broken Hill, New South Wales. Australian Journal of Mineralogy, 14(2), 63–67.

Mills, S. J. & Birch, W. D. (2009): Kolitschit, ein neues Arsenatmineral aus Australien. Mineralien-Welt, 21(1), 82-85 (in German).

Internet Links for Kolitschite

Localities for Kolitschite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • New South Wales
    • Yancowinna Co.
      • Broken Hill
Grey, I. E., Mumme, W. G., Bordet, P. & Mills, S. J. (2008) A new crystal-chemical variation of the alunite-type structure in monoclinic PbZn0.5Fe3(AsO4)2(OH)6. Canadian Mineralogist, 46(5), 1355–1364. Mills, S. J., Grey, I. E., Mumme, W. G., Miyawaki, R., Matsubara, S., Bordet, P., Birch, W. D. & Raudsepp, M. (2008) Kolitschite, Pb[Zn0.5,0.5]Fe3(AsO4)2(OH)6, a new mineral from Broken Hill, New South Wales, Australia, Australian Journal of Mineralogy, 14(2), 63–67; Mills, S. J. & Birch, W. D. (2009): Kolitschit, ein neues Arsenatmineral aus Australien. Mineralien-Welt 21 (1), 82-85 (in German).
Mineral and/or Locality  
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