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Aiolosite

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Big Photo

La Fossa crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy
© luigi chiappino

Show Aiolosite Photos (3)



Formula:
Na
 
4
Bi(SO
 
4
)
 
3
Cl
Crystal-chemical formula: Na2(Na2Bi)(SO4)3Cl
System:HexagonalColour:Colourless to white
Name:
After Aiolos, the Greek name of the mythological god of winds from whom the windy Aeolian Archipelago takes its name.


Apatite-type structure.

Classification of Aiolosite

IMA status:Approved 2008
Nickel-Strunz 10th (pending) edition ID:7.BD.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
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Type Occurrence of Aiolosite

Type Locality:La Fossa crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy
General Appearance of Type Material:Acicular to slender prismatic crystals up to 0.5 mm long. The crystals are terminated by the pinacoid or, more rarely, by a bipyramid.
Place of Conservation of Type Material:Dipartimento di Chimica Strutturale e Stereochimica Inorganica of Università degli Studi di Milano, Milan, Italy.
Year of Discovery:2008
Geological Setting of type material:In a medium-temperature (250 °C) intracrater fumarole on altered pyroclastic breccia.
Associated Minerals at type locality:
AluniteAnhydriteBismuthiniteDemicheleite-(Br)Demicheleite-(Cl)
Panichiite

Physical Properties of Aiolosite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Colourless to white
Streak:White
Tenacity:Brittle
Cleavage:None Observed
Fracture:None observed
Density (calculated):3.589 g/cm3

Crystallography of Aiolosite

Crystal System:Hexagonal
Class (H-M):6/m - Dipyramidal
Space Group:P63/m
Cell Parameters:a = 9.626(3) Å, c = 6.880(3) Å
Ratio:a:c = 1 : 0.715
Unit Cell Volume:V 552.1 ų
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
4.787 (20)
3.432 (45)
2.853 (100)
2.775 (85)
2.306 (25)
2.189 (15)
1.965 (35)
1.716 (20)

Optical Data of Aiolosite

Type:Uniaxial (+)
RI values: nω = 1.590() nε = 1.600(1)
Birefringence:0.01
Maximum Birefringence:δ = 0.010

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

Chemical Properties of Aiolosite

Formula:
Na
 
4
Bi(SO
 
4
)
 
3
Cl


Crystal-chemical formula: Na2(Na2Bi)(SO4)3Cl
Essential elements:Bi, Cl, Na, O, S
All elements listed in formula:Bi, Cl, Na, O, S
Analytical Data:Average of electron microprobe analyses (water from structure refinement); La Fossa crater, Italy.
Na2O (20.65)
K2O (0.96)
Bi2O3 (32.49)
SO3 (41.27)
Cl (4.02)
Br (0.75)
H2O (0.57)
O=Cl (-0.98)
Total (99.73)
Empirical Formula:
Na
 
2
(Na
 
1.95
K
 
0.12
Bi
 
0.83
)S
 
3.06
O
 
12.08
[Cl
 
0.67
Br
 
0.06
(H
 
2
O)
 
0.19
]

Relationship of Aiolosite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
7.BD.05Sulphohalite
Na
 
6
(SO
 
4
)
 
2
FCl
7.BD.05Sulfohalite
7.BD.10Galeite
Na
 
15
(SO
 
4
)
 
5
F
 
4
Cl
7.BD.10Schairerite
Na
 
3
(SO
 
4
)(F,Cl)
7.BD.15Kogarkoite
Na
 
3
(SO
 
4
)F
7.BD.20Caracolite
Na
 
3
Pb
 
2
(SO
 
4
)
 
3
Cl
7.BD.20Cesanite
Na
 
3
Ca
 
2
(SO
 
4
)
 
3
(OH)
7.BD.25Burkeite
Na
 
6
(CO
 
3
)(SO
 
4
)
 
2
7.BD.30Hanksite
Na
 
22
K(SO
 
4
)
 
9
(CO
 
3
)
 
2
Cl
7.BD.35Cannonite
Bi
 
2
(SO
 
4
)O(OH)
 
2
7.BD.40Lanarkite
Pb
 
2
(SO
 
4
)O
7.BD.45Grandreefite
Pb
 
2
(SO
 
4
)F
 
2
7.BD.50Itoite
Pb
 
3
Ge
4+
 
(SO
 
4
)
 
2
O
 
2
(OH)
 
2
7.BD.55Chiluite
Bi
 
3
Te
6+
 
Mo
6+
 
O
 
10.5
7.BD.60Hectorfloresite
Na
 
9
(SO
 
4
)
 
4
(IO
 
3
)
7.BD.65Pseudograndreefite
Pb
 
6
(SO
 
4
)F
 
10
7.BD.70Sundiusite
Pb
 
10
(SO
 
4
)O
 
8
Cl
 
2

Other Names for Aiolosite

Synonyms:
IMA2008-015
Other Languages:

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 Aiolosite

Reference List:

- +
IMA website - Proposals approved in July 2008

Ciriotti, M.E., Fascio, L. & Pasero, M. (2009): Italian Type Minerals. Edizioni Plus, Università di Pisa, Pisa, Italy, 357 pp.

Demartin, F., Gramaccioli, C.M., Campostrini, I. & Pilati, T. (2010): Aiolosite, Na2(Na2Bi)(SO4)3Cl, a new sulfate isotypic to apatite from La Fossa Crater, Vulcano, Aeolian Islands, Italy. American Mineralogist, 95, 382-385.

Internet Links for Aiolosite

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    • Localities for Aiolosite

    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.
    Italy
     
    • Sicily
      • Messina Province
        • Lipari
          • Eolie Islands (Aeolian Islands)
            • Vulcano Island
    		IMA website - Proposals approved in July 2008
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