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Brontesite

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About BrontesiteHide

09837050014949439744298.jpg
Brontes, Arges, and Steropes
Formula:
(NH4)3PbCl5
Colour:
Colourless to white
Lustre:
Vitreous
Specific Gravity:
2.72
Crystal System:
Orthorhombic
Name:
Named in 2009 by Francesco Demartin, Carlo M. Gramaccioli, and Italo Campostrini for Brontes, one of the Cyclopes, and a son of Uranus.
This page provides mineralogical data about Brontesite.


Classification of BrontesiteHide

Approved
Approval Year:
2008
3.AA.

3 : HALIDES
A : Simple halides, without H2O
A : M:X = 1:1, 2:3, 3:5, etc.
11.4.3.

11 : HALIDE COMPLEXES
4 : AmBX5·xH2O

Physical Properties of BrontesiteHide

Vitreous
Colour:
Colourless to white
Streak:
White
Cleavage:
None Observed
Fracture:
None observed
Density:
2.72(1) g/cm3 (Measured)    2.728 g/cm3 (Calculated)

Optical Data of BrontesiteHide

Type:
Biaxial
RI values:
n = 1.70(3)
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of BrontesiteHide

Formula:
(NH4)3PbCl5
Common Impurities:
K,Br

Crystallography of BrontesiteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnma
Cell Parameters:
a = 8.4351(9) Å, b = 15.7732(17) Å, c = 8.4446(9) Å
Ratio:
a:b:c = 0.535 : 1 : 0.535
Unit Cell V:
1123.5 ų
Z:
4
Morphology:
The habit is pseudotetragonal, tabular on {010}; the other most common forms are {110}, {011}, and {121}.
Twinning:
None observed.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.067 Å(100)
2.710 Å(78)
2.421 Å(75)
2.211 Å(60)
2.020 Å(80)
1.910 Å(78)
1.491 Å(75)
1.457 Å(65)

Type Occurrence of BrontesiteHide

General Appearance of Type Material:
Aggregates of pseudotetragonal tabular crystals.
Place of Conservation of Type Material:
Reference Collection of Dipartimento di Chimica Strutturale e Stereochimica Inorganica of Università degli Studi di Milano, Milan, Italy.
Geological Setting of Type Material:
In an active medium-temperature (~250°C) intracrater fumarole on a pyroclastic breccia.
Associated Minerals at Type Locality:

Synonyms of BrontesiteHide

Related Minerals - Nickel-Strunz GroupingHide

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.05UM1999-11:I:CuSCu(I,S)
3.AA.10IodargyriteAgIHex. 6mm : P6mm
3.AA.10Tocornalite(Ag,Hg)I
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.25UM1998-03-Cl:TlTlCl
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.30Kuzminite(Hg2+2)(Br,Cl)2Tet.
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.45KolaritePbTeCl2Orth.
3.AA.50RadhakrishnaitePbTe3(Cl,S)2Tet.
3.AA.55ChallacolloiteKPb2Cl5Mon. 2/m : P21/b
3.AA.60HephaistositeTlPb2Cl5Mon. 2/m : P21/b

Other InformationHide

Notes:
The mineral is not hygroscopic and is stable in the open air.
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 BrontesiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Demartin, F., Gramaccioli, C.M., Campostrini, I. (2009) Brontesite, (NH4)3PbCl5, a new product of fumarolic activity from La Fossa crater, Vulcano, Aeolian Islands, Italy. Canadian Mineralogist: 47: 1237-1243.
Ciriotti, M.E., Fascio, L., Pasero, M. (2009) Italian Type Minerals. Edizioni Plus, Università di Pisa, Pisa, Italy, 357 pp.

Internet Links for BrontesiteHide

Localities for BrontesiteHide

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
Demartin, F., Gramaccioli, C.M., Campostrini, I. (2009) Brontesite, (NH4)3PbCl5, a new product of fumarolic activity from La Fossa crater, Vulcano, Aeolian Islands, Italy. Canadian Mineralogist: 47: 1237-1243.
 
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