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Ianbruceite

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Ste Marie 2010
Formula:
[Zn2(OH)(H2O)(AsO4)](H2O)2
System:
Monoclinic
Colour:
Sky blue to very pale ...
Hardness:
1
Name:
for Ian Bruce (born 01/04/1969 at Okehampton, Devon, England), a prime mover in the recent reopening the Tsumeb mine for mineral collecting, who has made significant contributions to the mineral collections of many of the world’s major museums through his professional activities.
This page provides mineralogical data about Ianbruceite.

Classification of Ianbruceite

Approved
Approval Year:
2011
8.DA.50

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations
42.6.11.

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
mindat.org URL:
http://www.mindat.org/min-42231.html
Please feel free to link to this page.

Type Occurrence of Ianbruceite

General Appearance of Type Material:
thin flakes and tapered platy crystals up to 80 μm long
Place of Conservation of Type Material:
Department of Natural History, Royal Ontario Museum (catalogue number M53150) and holotype crystals are deposited in the collection of the Mineralogical Museum of the University of Hamburg, Grindelallee 48, D-20146 Hamburg, Germany (catalogue number TS 11
Geological Setting of Type Material:
‘Zinc Pocket’ on the 44 level of Tsumeb mine
Associated Minerals at Type Locality:

Physical Properties of Ianbruceite

Vitreous
Diaphaneity (Transparency):
Transparent
Colour:
Sky blue to very pale blue, white, colourless
Streak:
white
Hardness (Mohs):
1
Tenacity:
Flexible
Cleavage:
Perfect
parallel to (100)
Comment:
deforms plastically
Density:
3.197 g/cm3 (Calculated)

Crystallography of Ianbruceite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Space Group Setting:
P1 21/c 1
Cell Parameters:
a = 11.793(2) Å, b = 9.1138(14) Å, c = 6.8265(10) Å
β = 103.859(9)°
Ratio:
a:b:c = 1.294 : 1 : 0.749
Unit Cell Volume:
V 712.35 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction Data:
d-spacingIntensity
11.28 (100)
3.755 (9)
3.186 (14)
3.120 (12)
2.947 (16)
2.845 (5)
2.819 (8)
2.682 (8)

Optical Data of Ianbruceite

Type:
Biaxial
RI values:
nα = 1.601(2) nβ = 1.660(2) nγ = 1.662(2)
2V:
Measured: 18° (2), Calculated: 20°
Max Birefringence:
δ = 0.061
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v, weak
Pleochroism:
Non-pleochroic

Chemical Properties of Ianbruceite

Formula:
[Zn2(OH)(H2O)(AsO4)](H2O)2
All elements listed in formula:

Relationship of Ianbruceite to other Species

8.DA.05BearsiteBe2(AsO4)(OH) · 4H2O
8.DA.05MoraesiteBe2(PO4)(OH) · 4H2O
8.DA.10RoscheriteCa2Mn52+Be4(PO4)6(OH)4 · 6H2O
8.DA.10ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O
8.DA.10GreifensteiniteCa2Fe52+Be4(PO4)6(OH)4 · 6H2O
8.DA.10AtencioiteCa2Fe32+Mg2Be4(PO4)6(OH)4 · 6H2O
8.DA.10RuifrancoiteCa2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O
8.DA.10GuimarãesiteCa2Be4Zn5(PO4)6(OH)4 · 6H2O
8.DA.10FootemineiteCa2Mn2+Mn22+Mn22+Be4(PO4)6(OH)4 · 6H2O
8.DA.15UraloliteCa2Be4(PO4)3(OH)3 · 5H2O
8.DA.20WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
8.DA.25TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2O
8.DA.30Veszelyite(Cu,Zn)2Zn(PO4)2 · 2H2O
8.DA.35Kipushite(Cu,Zn)5Zn(PO4)2(OH)6 · H2O
8.DA.35Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2O
8.DA.40SpenceriteZn4(PO4)2(OH)2 · 3H2O
8.DA.45GlucineCaBe4(PO4)2(OH)4 · 0.5H2O

Other Names for Ianbruceite

Name in Other Languages:

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 Ianbruceite

Reference List:
Gebhard, G. (1999) Tsumeb II. A Unique Mineral Locality. GG Publishing, Grossenseifen, Germany, 328 p. (as Mineral GS17)

Cooper, M.A., Abdu, Y., Ball, N., Back, M., Hawthorne, F.C. and Tait, K. (2011): Ianbruceite, IMA 2011-049. CNMNC Newsletter No. 10, October 2011, page 2560.

Cooper, M.A., Abdu, Y.A., Ball, N.A., Hawthorne, F.C., Back, M.E., Tait, K.T., Schlüter, J., Malcherek, T., Pohl, D., Gebhard, G. (2012): Ianbruceite, ideally (H2O)2, a new arsenate mineral from the Tsumeb mine, Otjikoto (Oshikoto) region, Namibia: description and crystal structure. Mineralogical Magazine, 76, 1119-1131.

Neall, T., Leppington, C. M., Green, D., Rumsey, M. S. (2013): The First British Occurrences of Ianbruceite from the Caldbeck Fells, Cumbria. UK Journal of Mines & Minerals 34, 8-12. [see also http://en.wikipedia.org/wiki/Ianbruceite]

Internet Links for Ianbruceite

Localities for Ianbruceite

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.
Namibia (TL)
 
  • Otjikoto Region (Oshikoto)
    • Tsumeb
Cooper, M.A., Abdu, Y., Ball, N., Back, M., Hawthorne, F.C. and Tait, K. (2011): Ianbruceite, IMA 2011-049. CNMNC Newsletter No. 10, October 2011, page 2560; Cooper, M.A., Abdu, Y.A., Ball, N.A., Hawthorne, F.C., Back, M.E., Tait, K.T., Schlüter, J., Malcherek, T., Pohl, D., Gebhard, G. (2012): Ianbruceite, ideally (H2O)2, a new arsenate mineral from the Tsumeb mine, Otjikoto (Oshikoto) region, Namibia: description and crystal structure. Mineralogical Magazine, 76, 1119-1131.
UK
 
  • England
    • Cumbria
      • Caldbeck Fells
Neall, T., Leppington, C. M., Green, D., Rumsey, M. S. (2013): The First British Occurrences of Ianbruceite from the Caldbeck Fells, Cumbria. UK Journal of Mines & Minerals 34, 8-12.
Neall, T., Leppington, C. M., Green, D., Rumsey, M. S. (2013): The First British Occurrences of Ianbruceite from the Caldbeck Fells, Cumbria. UK Journal of Mines & Minerals 34, 8-12.
Mineral and/or Locality  
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