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Hotsonite

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Formula:
Al
 
11
(SO
 
4
)
 
3
(PO
 
4
)
 
2
(OH)
 
21
· 16H
 
2
O
System:TriclinicColour:white
Hardness:
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:43.5.18.1

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 (Hotson 42 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

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

Crystallography of Hotsonite

Crystal System:Triclinic
Morphology:Lathlike or acicular, up to 15 μm in length.
X-Ray Powder Diffraction:
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
Maximum Birefringence:δ = 0.002

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Hotsonite

Formula:
Al
 
11
(SO
 
4
)
 
3
(PO
 
4
)
 
2
(OH)
 
21
· 16H
 
2
O
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):

- +
8.DF.10Bolivarite
Al
 
2
(PO
 
4
)(OH)
 
3
· 4-5H
 
2
O
8.DF.10Evansite
Al
 
3
(PO
 
4
)(OH)
 
6
· 6H
 
2
O
8.DF.10Liskeardite
[(Al,Fe)
 
32
(AsO
 
4
)
 
18
(OH)
 
42
(H
 
2
O)
 
22
] · 52H
 
2
O
8.DF.10Rosièresite
(Pb, Cu, Al, P, O, H)
8.DF.15Rusakovite
(Fe
3+
 
,Al)
 
5
(VO
 
4
,PO
 
4
)
 
2
(OH)
 
9
· 3H
 
2
O
8.DF.20Liroconite
Cu
 
2
Al(AsO
 
4
)(OH)
 
4
· 4H
 
2
O
8.DF.25Sieleckiite
Cu
 
3
Al
 
4
(PO
 
4
)
 
2
(OH)
 
12
· 2H
 
2
O
8.DF.30Chalcophyllite
Cu
 
18
Al
 
2
(SO
 
4
)
 
3
(AsO
 
4
)
 
3
(OH)
 
27
· 33H
 
2
O
8.DF.35Parnauite
Cu
 
9
(AsO
 
4
)
 
2
(SO
 
4
)(OH)
 
10
· 7H
 
2
O
8.DF.40Gladiusite
Fe
 
2
(Fe,Mg)
 
4
(PO
 
4
)(OH)
 
11
(H
 
2
O)
Related Minerals - Hey's Index Grouping:

- +
22.3.1Parnauite
Cu
 
9
(AsO
 
4
)
 
2
(SO
 
4
)(OH)
 
10
· 7H
 
2
O
22.3.2Ardealite
Ca
 
2
(HPO
 
4
)(SO
 
4
) · 4H
 
2
O
22.3.3Machatschkiite
(Ca,Na)
 
6
(AsO
 
4
)(HAsO
 
4
)
 
3
(PO
 
4
,SO
 
4
) · 15H
 
2
O
22.3.4Clinotyrolite
Ca
 
2
Cu
 
9
(AsO
 
4
,SO
 
4
)
 
4
(OH,O)
 
10
· 10H
 
2
O
22.3.5Peisleyite
Na
 
2
Al
 
9
[(P,S)O
 
4
]
 
8
(OH)
 
6
•28H
 
2
O
22.3.6Chalcophyllite
Cu
 
18
Al
 
2
(SO
 
4
)
 
3
(AsO
 
4
)
 
3
(OH)
 
27
· 33H
 
2
O
22.3.7Woodhouseite
CaAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.8Schlossmacherite
(H
 
3
O)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
22.3.9Svanbergite
SrAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.10Kemmlitzite
(Sr,Ce)Al
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.11Sanjuanite
Al
 
2
(PO
 
4
)(SO
 
4
)(OH) · 9H
 
2
O
22.3.12Kribergite
Al
 
5
(PO
 
4
)
 
3
(SO
 
4
)(OH)
 
4
· 4H
 
2
O
22.3.14Weilerite
BaAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.15Tsumebite
Pb
 
2
Cu(PO
 
4
)(SO
 
4
)(OH)
22.3.16Arsentsumebite
Pb
 
2
Cu(AsO
 
4
)(SO
 
4
)(OH)
22.3.17Hinsdalite
PbAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.18Hidalgoite
PbAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.19Orpheite
22.3.20Coconinoite
Fe
3+
2
Al
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
4
(SO
 
4
)(OH)
 
2
· 20H
 
2
O
22.3.21Sasaite
(Al,Fe
3+
 
)
 
14
(PO
 
4
)
 
11
(SO
 
4
)(OH)
 
7
· 83H
 
2
O
22.3.22Tristramite
(Ca,U,Fe)(PO
 
4
,SO
 
4
) · 2H
 
2
O
22.3.23Corkite
PbFe
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.24Beudantite
PbFe
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.25Diadochite
Fe
3+
2
(PO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
22.3.26Sarmientite
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
22.3.27Bukovskýite
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 9H
 
2
O
22.3.28Zýkaite
Fe
3+
4
(AsO
 
4
)
 
3
(SO
 
4
)(OH) · 15H
 
2
O
22.3.29Tooeleite
Fe
3+
6
(As
3+
 
O
 
3
)
 
4
(SO
 
4
)(OH)
 
4
· 4H
 
2
O
22.3.30Pitticite
(Fe, SO
 
4
, AsO
 
4
, H
 
2
O) ?
22.3.31Xiangjiangite
(Fe
3+
 
,Al)(UO
 
2
)
 
4
(PO
 
4
)
 
2
(SO
 
4
)
 
2
(OH) · 22H
 
2
O

Other Names for Hotsonite

Synonyms:
Hotsonite-VIHotsonite-VIIIMA1983-033
Other Languages:
German:Hotsonit
Spanish:Hotsonita

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 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

Search Engines:
  • Look for Hotsonite on Google
  • Look for Hotsonite images on Google
  • External Links:
  • Look for Hotsonite on Webmineral
  • Look for Hotsonite on Athena Mineralogy
  • Look for Hotsonite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Hotsonite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Hotsonite specimens for sale - minfind.com
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  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Fine Minerals from Weinrich Minerals, Inc.
  • 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.
    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
     
    • 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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