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Kolitschite

Formula:
PbZn
 
0.5
Fe
 
3
(AsO
 
4
)
 
2
(OH)
 
6
System:MonoclinicColour: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 Alunite Group, 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

IMA status:Approved 2008
Nickel-Strunz 10th (pending) edition ID: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
Dana 8th edition ID:42.7.4.8

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
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Type Occurrence of Kolitschite

Type Locality:Kintore Opencut, Broken Hill, Yancowinna Co., New South Wales, Australia
Place of Conservation of Type Material:Museum Victoria
Year of Discovery:1991
Associated Minerals at type locality:
SegnititeMimetiteCryptomelaneCarminite

Physical Properties of Kolitschite

Lustre: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 (calculated):4.674 g/cm3

Crystallography of Kolitschite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
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:
d-spacingIntensity
3.114 (100)
6.034 (45)
2.280 (37)
3.719 (31)

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:
PbZn
 
0.5
Fe
 
3
(AsO
 
4
)
 
2
(OH)
 
6
Essential elements:As, Fe, H, O, Pb, Zn
All elements listed in formula:As, Fe, H, O, Pb, Zn

Relationship of Kolitschite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.BM.05Retzian-(Ce)
Mn
2+
2
Ce(AsO
 
4
)(OH)
 
4
8.BM.05Retzian-(La)
(Mn
2+
 
,Mg)
 
2
(La,Ce,Nd)(AsO
 
4
)(OH)
 
4
8.BM.05Retzian-(Nd)
Mn
2+
2
(Nd,Ce,La)(AsO
 
4
)(OH)
 
4
8.BM.10Paulkellerite
(BiO)
 
2
Fe
3+
 
[(OH)
 
2
|PO
 
4
]
8.BM.15Brendelite
(Bi
3+
 
,Pb)
 
2
(Fe
3+
 
,Fe
2+
 
)[(O,OH)
 
3
|PO
 
4
]

Other Names for Kolitschite

Synonyms:
IMA2008-063Unnamed (Pb-Zn-Fe Arsenate)
Other Languages:
German:Kolitschit

Other Information

Health Warning: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, Australia. Australian Journal of Mineralogy, 14(2), 63–67.

Internet Links for Kolitschite

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    Localities for Kolitschite

    (TL) indicates type locality. ? 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.
    Mineral and/or Locality
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