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Chloraluminite

Formula:
AlCl
 
3
·6H
 
2
O
System:TrigonalColour:Colourless to white; ...
Name:In allusion to the composition, containing CHLORine and ALUMINium.
This page provides mineralogical data about Chloraluminite.

Classification of Chloraluminite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:3/A.13-20
Nickel-Strunz 10th (pending) edition ID:3.BC.05

3 : HALIDES
B : Simple halides, with H2O
C : M:X = 1:3
Dana 8th edition ID:9.3.3.1

9 : NORMAL HALIDES
3 : AX3
Hey's CIM Ref.:8.6.2

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
6 : Halides of Al
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Type Occurrence of Chloraluminite

Type Locality:Mt. Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy
Year of Discovery:1873
Associated Minerals at type locality:
MolysiteChloromagnesite

Physical Properties of Chloraluminite

Colour:Colourless to white; yellowish; colourless in transmitted light.

Crystallography of Chloraluminite

Crystal System:Trigonal
Cell Parameters:a = 11.83Å, c = 11.91Å
Ratio:a:c = 1 : 1.007
Unit Cell Volume:V 1,443.48 ų (Calculated from Unit Cell)
Morphology:Occurs in crystalline crusts and stalactites. Rhombohedral (natural crystals); prismatic [0001] (artificial crystals).

Optical Data of Chloraluminite

Type:Uniaxial (-)
RI values: nω = 1.560 nε = 1.507
Maximum Birefringence:δ = 0.053

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

Chemical Properties of Chloraluminite

Formula:
AlCl
 
3
·6H
 
2
O
Essential elements:Al, Cl, H, O
All elements listed in formula:Al, Cl, H, O

Relationship of Chloraluminite to other Species

Related Minerals - Hey's Index Grouping:

- +
8.6.1Zharchikhite
AlF(OH)
 
2
8.6.3Cadwaladerite
Al(OH)
 
2
Cl·4H
 
2
O
8.6.4Cryolithionite
Na
 
3
Li
 
3
[AlF
 
6
]
 
2
8.6.5Cryolite
Na
 
3
[AlF
 
6
]
8.6.6Chiolite
Na
 
3
Al
 
3
F
 
14
8.6.7Elpasolite
NaK
 
2
[AlF
 
6
]
8.6.8Weberite
Na
 
2
Mg[F|AlF
 
6
]
8.6.9Ralstonite
NaMgAl(F,OH)
 
6
·H
 
2
O
8.6.10Koenenite
Na
 
4
Mg
 
9
Al
 
4
Cl
 
12
(OH)
 
22
8.6.11 Chlor-manasseite
Mg
 
x
Al(OH)
 
2x+2
Cl·(x-0.8)H
 
2
O x about 1.75
8.6.12Gearksutite
Ca[Al(F,OH)
 
5
(H
 
2
O)]
8.6.13Prosopite
CaAl
 
2
(F,OH)
 
8
8.6.14Yaroslavite
Ca
 
3
Al
 
2
F
 
10
(OH)
 
2
·H
 
2
O
8.6.15Carlhintzeite
Ca
 
2
[F|AlF
 
6
] · H
 
2
O
8.6.16Colquiriite
CaLi[AlF
 
6
]
8.6.17Thomsenolite
NaCaAlF
 
6
·H
 
2
O
8.6.18Pachnolite
NaCaAlF
 
6
·H
 
2
O
8.6.19Zirklerite
(Fe,Mg,Ca)
 
9
Al
 
4
Cl
 
18
(OH)
 
12
·14H
 
2
O (?)

Other Names for Chloraluminite

Synonyms:
Chloralluminite
Other Languages:
German:Chloralluminit
Chloraluminit
Italian:Chloralluminio
Russian:Хлоралюминит
Spanish:Chloralluminita
Chloraluminita

Other Information

Thermal Behaviour:Decomposes at a low tempeature.
Other Information:Deliquescent. Very soluble in water.
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 Chloraluminite

Reference List:Scacchi, A. (1874) Reale accademia delle scienze fisische e matematiche, Naples, Att.: 6, no. 9: 43, 68 (as Chloralluminio).

vom Rath (1877) Verh. naturhist. Ver. Rheinland: 34: 152.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York.: 165.

Gill, In: Dennis (1895) Zeitschrift für anorganische und allgemeine Chemie, Hamburg, Leipzig: 9: 340.

Lacroix (1907) Bulletin de la Société française de Minéralogie: 30: 254.

Takahashi, et al (1928) Journal of the Geological Society of Tokyo: 35: 439.

Andress and Carpenter (1934) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 87: 446.

Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 51.

Acta Crystallographica: B24:954.

Acta Crystallographica: B27: 1069-1070.

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    Localities for Chloraluminite

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    The 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.
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    (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.
    Antarctica
     
    • Western Antarctica
      • Antarctic Peninsula
        • South Shetland Islands
    		Viramonte, J.G., Sureda, R.J., Bossi, G.E., Fourcade, N.H., Omarini, R.H., Geochemical and mineralogical study of the high temperature fumaroles from Decepcion Island, South Shetland, Antarctica. Inst. Assoc. of Volc. and chemistry of the erath interior. Symposium Andean and Antarctic Volcanology Problems. Chile (1974).
    France
     
    • Alsace
      • Bas-Rhin
        • Obernai
    		Wittern, Journée: "Mineralien finden in den Vogesen", von Loga (Cologne), 1997
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 50.
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