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|Name:||For the locality.|
White, chalk-like incrustations.
Classification of Hotsonite
|IMA status:||Approved 1983|
|Strunz 8th edition ID:||7/D.21-10|
|Nickel-Strunz 10th (pending) edition ID:||8.DF.05|
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
F : With only medium-sized cations, (OH,etc.):RO4 > 3:1
|Dana 8th edition ID:||188.8.131.52|
43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
|Hey's CIM Ref.:||22.3.13|
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
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Type Occurrence of Hotsonite
|Type Locality:||Hotson 6 Mine, Koenabib farm, Bushmanland, Northern Cape Province, South Africa|
|Place of Conservation of Type Material:||National Museum, Bloemfontein, South Africa (specimen K22359)|
|Year of Discovery:||1983|
|Geological Setting of type material:||Weathered sillimanite deposit. The sillimanite weathers to natro-alunite and zaherite, which is then weathered to hotsonite.|
Physical Properties of Hotsonite
|Density (measured):||2.06 - 2.07 g/cm3|
Crystallography of Hotsonite
|Morphology:||Lathlike or acicular, up to 15 μm in length.|
|X-Ray Powder Diffraction:|
Optical Data of Hotsonite
|RI values:||nα = 1.519 nγ = 1.521|
|Maximum Birefringence:||δ = 0.002|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Hotsonite
|Simplified for copy/paste:||Al11(SO4)3(PO4)2(OH)21·16H2O|
|Essential elements:||Al, H, O, P, S|
|All elements listed in formula:||Al, H, O, P, S|
Relationship of Hotsonite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Hotsonite
|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 Hotsonite
Burkes et al. (1984): Hotsonite, a new hydrated aluminum-phosphate-sulfate from Pofarder, South Africa. American Mineralogist 68, 979-983.
American Mineralogist: 69: 979-983.
American Mineralogist: 76: 1734.
Internet Links for Hotsonite
Localities for Hotsonite
(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.