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Hydroxykenoelsmoreite

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Formula:
(□,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)
Colour:
Canary yellow
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
5.806 (Calculated)
Crystal System:
Trigonal
Compare hydrokenoelsmoreite.

Ordering Fe3+ in one of the two W sites leads to lowering the symmetry (crystal system) from the typical isometric one of the trigonal one.


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Classification of HydroxykenoelsmoreiteHide

Approved
Approval Year:
2016
First Published:
2017

Physical Properties of HydroxykenoelsmoreiteHide

Vitreous
Transparency:
Transparent
Colour:
Canary yellow
Streak:
Pale yellow
Hardness:
Comment:
ca. 3, by analogy to hydrokenoelsmoreite
Tenacity:
Brittle
Cleavage:
Perfect
{001}
Fracture:
Irregular/Uneven
Density:
5.806 g/cm3 (Calculated)

Optical Data of HydroxykenoelsmoreiteHide

Type:
Uniaxial (-)
RI values:
n = 2.065
Birefringence:
n too high to be measured, the reported value is predicted via the Gladstone-Dale compatibility index
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of HydroxykenoelsmoreiteHide

Formula:
(□,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)
IMA Formula:
(◻,Pb)2(W,Fe3+,Al)2(O,OH)6(OH)

Crystallography of HydroxykenoelsmoreiteHide

Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 7.313(2) Å, c = 17.863(7) Å
Ratio:
a:c = 1 : 2.443
Unit Cell V:
827 ų
Z:
6

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.99(51)
3.128(64)
2.983(100)
2.582(32)
1.825(57)
1.558(47)
1.490(14)
1.186(20)

Type Occurrence of HydroxykenoelsmoreiteHide

General Appearance of Type Material:
Rosettes, up to 150 μm in diameter, consisting of platy crystals, up to 20 μm and below 2μm in thickness
Place of Conservation of Type Material:
Mineralogical collections of the Museum Victoria, Melbourne, Victoria, Australia, registration number M53606
Associated Minerals at Type Locality:
Reference:
Mills, S.J., Christy, A.G., Kampf, A.R., Birch, W.D., Kasatkin, A. (2017): Hydroxykenoelsmoreite, the first new mineral from the Republic of Burundi. European Journal of Mineralogy, 29, 491-497.

Synonyms of HydroxykenoelsmoreiteHide

Relationship of Hydroxykenoelsmoreite to other SpeciesHide

Other Members of this group:
Hydrokenoelsmoreite2W2O6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m

Other InformationHide

Notes:
Raman spectroscopy and bond valence sums are suggestible of absence of near-absence of water
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 HydroxykenoelsmoreiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Mills, S.J., Christy, A.G., Kampf, A.R., Birch, W.D., Kasatkin, A. (2016): Hydroxykenoelsmoreite, IMA 2016-056. CNMNC Newsletter No. 33, October 2016, page 1141; Mineralogical Magazine: 80: 1135–1144
Mills, S.J., Christy, A.G., Kampf, A.R., Birch, W.D., Kasatkin, A. (2017): Hydroxykenoelsmoreite, the first new mineral from the Republic of Burundi. European Journal of Mineralogy, 29: 491-497.

Internet Links for HydroxykenoelsmoreiteHide

Localities for HydroxykenoelsmoreiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Burundi (TL)
 
  • Muyinga Province
Mills, S.J., Christy, A.G., Kampf, A.R., Birch, W.D. and Kasatkin, A. (2016) Hydroxykenoelsmoreite, IMA 2016-056. CNMNC Newsletter No. 33, October 2016, page 1141; Mineralogical Magazine, 80, 1135–1144; Mills, S.J., Christy, A.G., Kampf, A.R., Birch, W.D., Kasatkin, A. (2017): Hydroxykenoelsmoreite, the first new mineral from the Republic of Burundi. European Journal of Mineralogy, 29, 491-497.
Mineral and/or Locality  
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