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Hotsonite

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Big Photo

Pella, Namaqualand, Northern Cape Province, South Africa
© 2008, JGW

Show Hotsonite Photos (3)



Formula:
Al
 
11
(SO
 
4
)
 
3
(PO
 
4
)
 
2
(OH)
 
21
 · 16H
 
2
O
System:TriclinicColour:white
Hardness:2½
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, 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):2½
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
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
3+
 
)
 
3
(AsO
 
4
)(OH)
 
6
 · 5H
 
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
 
3
Al
 
16
(PO
 
4
)
 
10
(SO
 
4
)
 
2
(OH)
 
17
 · 20H
 
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,Ca)Al
 
3
(SO
 
4
,AsO
 
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
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) · 7H
 
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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Hotsonite details from Handbook of Mineralogy (PDF)
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    • Localities for Hotsonite

    Hide Locality List
    (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
    		Minerals of South Africa
      • Namaqualand
    		Natural History Museum Vienna collection
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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