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Demicheleite-(I)

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Formula:
BiSI
System:Orthorhombic


I-dominant analogue of demicheleite-(Br) and demicheleite-(Cl).

Classification of Demicheleite-(I)

IMA status:Approved 2009
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Type Occurrence of Demicheleite-(I)

Type Locality:La Fossa Crater, Vulcano Island, Eolie Islands (Aeolian Islands), Lipari, Messina Province, Sicily, Italy

Crystallography of Demicheleite-(I)

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:Pnma {P21/n 21/m 21/a}
Cell Parameters:a = 8.4501(7) Å, b = 10.1470(9) Å, c = 4.1389(4) Å
Ratio:a:b:c = 0.833 : 1 : 0.408
Unit Cell Volume:V 354.88 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
6.490(100)
4.346(94)
3.896(90)
3.243(22)
2.999(22)
2.709(60)
2.466(21)
2.161(38)

Chemical Properties of Demicheleite-(I)

Formula:
BiSI
Essential elements:Bi, I, S
All elements listed in formula:Bi, I, S

Other Names for Demicheleite-(I)

Synonyms:
IMA2009-049
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 Demicheleite-(I)

Reference List:

- +
Demartin, F., Gramaccioli, C.M., Campostrini, I. (2010): Demicheleite-(I), BiSI, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy. Mineralogical Magazine, 74, 141-145.

Internet Links for Demicheleite-(I)

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    • Localities for Demicheleite-(I)

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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
    		Demartin, F., Gramaccioli, C.M., Campostrini, I. (2010): Demicheleite-(I), BiSI, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy. Mineralogical Magazine, 74, 141-145.
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