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Hotsonite

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Formula:
Al11(SO4)3(PO4)2(OH)21 · 16H2O
System:
Triclinic
Colour:
white
Hardness:
Name:
For the locality.
White, chalk-like incrustations.

Classification of Hotsonite

Approved 1983
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
43.5.18.1

43 : COMPOUND PHOSPHATES, ETC.
5 : Hydrated Compound Phosphates, etc·, Containing Hydroxyl or Halogen
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

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

Silky
Diaphaneity (Transparency):
Translucent
Colour:
white
Hardness (Mohs):
Density:
2.06 - 2.07 g/cm3 (Measured)    

Crystallography of Hotsonite

Crystal System:
Triclinic
Morphology:
Lathlike or acicular, up to 15 μm in length.
X-Ray Powder Diffraction Data:
d-spacingIntensity
10.05 (100)
8.45 (40)
5.20 (10)
5.01 (10)
4.63 (20)
4.43 (10)
3.67 (10)

Optical Data of Hotsonite

Type:
Biaxial
RI values:
nα = 1.519 nγ = 1.521
Birefringence:
<0.003
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Hotsonite

Formula:
Al11(SO4)3(PO4)2(OH)21 · 16H2O
Essential elements:
All elements listed in formula:

Relationship of Hotsonite to other Species

8.DF.10BolivariteAl2(PO4)(OH)3 · 4-5H2O
8.DF.10EvansiteAl3(PO4)(OH)6 · 6H2O
8.DF.10Liskeardite[(Al,Fe)32(AsO4)18(OH)42(H2O)22] · 52H2O
8.DF.10Rosièresite(Pb, Cu, Al, P, O, H)
8.DF.15Rusakovite(Fe3+,Al)5(VO4,PO4)2(OH)9 · 3H2O
8.DF.20LiroconiteCu2Al(AsO4)(OH)4 · 4H2O
8.DF.25SieleckiiteCu3Al4(PO4)2(OH)12 · 2H2O
8.DF.30ChalcophylliteCu18Al2(SO4)3(AsO4)3(OH)27 · 33H2O
8.DF.35ParnauiteCu9(AsO4)2(SO4)(OH)10 · 7H2O
8.DF.40GladiusiteFe2(Fe,Mg)4(PO4)(OH)11(H2O)
22.3.1ParnauiteCu9(AsO4)2(SO4)(OH)10 · 7H2O
22.3.2ArdealiteCa2(HPO4)(SO4) · 4H2O
22.3.3Machatschkiite(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O
22.3.4ClinotyroliteCa2Cu9(AsO4,SO4)4(OH,O)10 · 10H2O
22.3.5PeisleyiteNa2Al9[(P,S)O4]8(OH)6•28H2O
22.3.6ChalcophylliteCu18Al2(SO4)3(AsO4)3(OH)27 · 33H2O
22.3.7WoodhouseiteCaAl3(PO4)(SO4)(OH)6
22.3.8Schlossmacherite(H3O)Al3(SO4)2(OH)6
22.3.9SvanbergiteSrAl3(PO4)(SO4)(OH)6
22.3.10KemmlitziteSrAl3(AsO4)(SO4)(OH)6
22.3.11SanjuaniteAl2(PO4)(SO4)(OH) · 9H2O
22.3.12KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2O
22.3.14WeileriteBaAl3(AsO4)(SO4)(OH)6
22.3.15TsumebitePb2Cu(PO4)(SO4)(OH)
22.3.16ArsentsumebitePb2Cu(AsO4)(SO4)(OH)
22.3.17HinsdalitePbAl3(PO4)(SO4)(OH)6
22.3.18HidalgoitePbAl3(AsO4)(SO4)(OH)6
22.3.19Orpheite
22.3.20CoconinoiteFe23+Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2O
22.3.21Sasaite(Al,Fe3+)14(PO4)11(SO4)(OH)7 · 83H2O
22.3.22Tristramite(Ca,U,Fe)(PO4,SO4) · 2H2O
22.3.23CorkitePbFe3(PO4)(SO4)(OH)6
22.3.24BeudantitePbFe3(AsO4)(SO4)(OH)6
22.3.25DiadochiteFe23+(PO4)(SO4)(OH) · 5H2O
22.3.26SarmientiteFe23+(AsO4)(SO4)(OH) · 5H2O
22.3.27BukovskýiteFe23+(AsO4)(SO4)(OH) · 9H2O
22.3.28ZýkaiteFe43+(AsO4)3(SO4)(OH) · 15H2O
22.3.29TooeleiteFe63+(As3+O3)4(SO4)(OH)4 · 4H2O
22.3.30Pitticite(Fe, SO4, AsO4, H2O) ?
22.3.31Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2O

Other Names for Hotsonite

Name in Other Languages:
German:Hotsonit
Spanish:Hotsonita

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 Hotsonite

Reference List:
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 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.
China
 
  • Hubei Province
    • Shiyan Prefecture
      • Zhushan Co.
Zhenrong Shi, Keqin Cai, and Mingquan Gong (2008): Northwestern Geology 45(2), 56-62
  • Shaanxi Province
    • Ankang Prefecture
      • Baihe Co.
Zhenrong Shi and Keqin Cai (2007): Superhard Material Engineering 18(4)
South Africa (TL)
 
  • Northern Cape Province
    • Bushmanland
      • Koenabib farm (Hotson 42 farm)
Minerals of South Africa; Schoch A E, Beukes G J, Praekelt H E (1985) A natroalunite - zaherite - hotsonite paragenesis from Pofadder, Bushmanland, South Africa. The Canadian Mineralogist 23, 29-34; G. J. Beukes, A. E. Schoch, H. de Bruiyn, W. A. van der Westhuizen and L. D. C. Bok (1984) A New Occurrence of the Hydrated Aluminium Sulphate Zaherite, from Pofadder, South Africa Mineralogical Magazine 48:131-135
    • Namakwa District (Namaqualand)
Natural History Museum Vienna collection
Mineral and/or Locality  
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