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Crystal System:
From Greek mythology for Hephaistos, the god of fire, equating to the Roman god of fire Vulcano, name of the type locality.
Isostructural with:
The Tl analogue of challacolloite.

Compare Unnamed (Pb-Tl chloride).

In experimental sublimation (Mutnovsky volcano) a phase likely corrensponding to hephaistosite crystallizes in temperatures below 330-340oC (Zelensky & Bortnikova, 2005).

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Classification of HephaistositeHide

Approval Year:

A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.

Chemical Properties of HephaistositeHide


Crystallography of HephaistositeHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 8.9477 Å, b = 7.9218 Å, c = 12.4955 Å
β = 90.092°
a:b:c = 1.13 : 1 : 1.577
Unit Cell V:
885.70 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
3.971 (83)
3.696 (100)
2.851 (38)
2.569 (42)
2.273 (22)
2.236 (25)
2.109 (45)
1.848 (41)

Type Occurrence of HephaistositeHide

Synonyms of HephaistositeHide

Other Language Names for HephaistositeHide

Simplified Chinese:氯铊铅矿

Related Minerals - Nickel-Strunz GroupingHide

3.AA.Brontesite(NH4)3PbCl5Orth. mmm (2/m 2/m 2/m) : Pnma
3.AA.05MarshiteCuIIso. 4 3m : F4 3m
3.AA.05Miersite(Ag,Cu)IIso. 4 3m : F4 3m
3.AA.05NantokiteCuClIso. 4 3m : F4 3m
3.AA.10IodargyriteAgIHex. 6mm : P6mm
3.AA.15BromargyriteAgBrIso. m3m (4/m 3 2/m) : Fm3m
3.AA.15ChlorargyriteAgClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20CarobbiiteKFIso. m3m (4/m 3 2/m)
3.AA.20GriceiteLiFIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20HaliteNaClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20SylviteKClIso. m3m (4/m 3 2/m) : Fm3m
3.AA.20VilliaumiteNaFIso. m3m (4/m 3 2/m) : Fd3m
3.AA.25SalammoniacNH4ClIso. 4 3 2
3.AA.25LafossaiteTl(Cl,Br)Iso. m3m (4/m 3 2/m) : Pm3m
3.AA.30Calomel(Hg2)2+Cl2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.30Moschelite(Hg2+2)I2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
3.AA.35NeighboriteNaMgF3Orth. mmm (2/m 2/m 2/m)
3.AA.40ChlorocalciteKCaCl3Orth. mmm (2/m 2/m 2/m) : Pnma
3.AA.55ChallacolloiteKPb2Cl5Mon. 2/m : P21/b

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for HephaistositeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Campostrini, I., Demartin, F., Gramaccioli, C.M., Orlandi, P. (2008): Hephaistosite, TlPb2Cl5, a new thallium mineral from La Fossa crater, Vulcano, Aeolian Islands, Italy. Canadian Mineralogist, 46, 701-708.
Mitolo D., Pinto D., Garavelli A., Bindi L. & Vurro F. (2009): The role of the minor substitutions in the crystal structure of natural challacolloite, KPb2Cl5, and hephaistosite, TlPb2Cl5, from Vulcano (Aeolian Archipelago, Italy). Mineralogy and Petrology 96, 121-128.
Zelensky, M., Bortnikova, S. (2005): Sublimate speciation at Mutnovsky volcano, Kamchatka. European Journal of Mineralogy: 17: 107-118

Internet Links for HephaistositeHide

Localities for HephaistositeHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Italy (TL)
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
Campostrini I., Demartin F., Gramaccioli C.M. (2008): Hephaistosite, TlPb2Cl5 a new mineral species from La Fossa crater, Vulcano, Aeolian Islands, Italy. - Canadian Mineralogist 46, 701-708; Mitolo D., Pinto D., Garavelli A., Bindi L. & Vurro F. (2009): The role of the minor substitutions in the crystal structure of natural challacolloite, KPb2Cl5, and hephaistosite, TlPb2Cl5, from Vulcano (Aeolian Archipelago, Italy). Mineralogy and Petrology 96, 121-128.
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