Philoxenite (original) (raw)

A valid IMA mineral species

Formula:

(K,Na,Pb)4(Na,Ca)2(Mg,Cu)3(Fe3+0.5Al0.5)(SO4)8

Colour:

Colourless to very pale yellowish

Specific Gravity:

3.027 (Calculated)

Name:

The name is derived from the ancient Greek words ϕίλος, a friend, and ξένος, a guest, in allusion to the complex cationic composition of the mineral and the presence of significant amounts of admixtures at nine of eleven independent cationic positions in its crystal structure.

New structure type. Unique combination of elements.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:47599:0

7013f205-3fde-40f8-9a1c-93ed59dc862c

IMA Classification of PhiloxeniteHide

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IMA Formula:

(K,Na,Pb)4(Na,Ca)2(Mg,Cu)3(Fe3+0.5Al0.5)(SO4)8

Type description reference:

Pekov, I.V., Agakhanov, A.A., Zubkova, N.V., Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Turchkova, A.G., Sidorov, E.G. (2020) Philoxenite, (K,Na,Pb)4(Na,Ca)2(Mg,Cu)3( Al0.5)(SO4)8, a new mineral from fumarole exhalations of the Tolbachik Volcano, Kamchatka, Russia. Notes of the Russian Mineralogical Society: 149(4): 67-77.

Classification of PhiloxeniteHide

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7.AC.60

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of PhiloxeniteHide

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Colour:

Colourless to very pale yellowish

Fracture:

Irregular/Uneven

Density:

3.027 g/cm3 (Calculated)

Optical Data of PhiloxeniteHide

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RI values:

_n_α = 1.562(2) _n_β = 1.572(2) _n_γ = 1.580(2)

δ = 0.018

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Dispersion:

Very strong, r > v

Pleochroism:

Non-pleochroic

Chemistry of PhiloxeniteHide

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Mindat Formula:

(K,Na,Pb)4(Na,Ca)2(Mg,Cu)3(Fe3+0.5Al0.5)(SO4)8

Crystallography of PhiloxeniteHide

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Cell Parameters:

a = 8.8410(3) Å, b = 8.9971(3) Å, c = 16.1861(5) Å
α = 91.927(3)°, β = 94.516(3)°, γ = 90.118(3)°

Ratio:

a:b:c = 0.983 : 1 : 1.799

Unit Cell V:

1,282.76 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of PhiloxeniteHide

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General Appearance of Type Material:

Isolated oblique-angled, pseudotrigonal or polygonal tabular crystals up to 0.3 × 0.6 mm.

Place of Conservation of Type Material:

collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia (registration number 4809/1)

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Pekov, I.V., Agakhanov, A.A., Zubkova, N.V., Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Turchkova, A.G., Sidorov, E.G. (2020) Philoxenite, (K,Na,Pb)4(Na,Ca)2(Mg,Cu)3( Al0.5)(SO4)8, a new mineral from fumarole exhalations of the Tolbachik Volcano, Kamchatka, Russia. Notes of the Russian Mineralogical Society: 149(4): 67-77.

Synonyms of PhiloxeniteHide

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Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of PhiloxeniteHide

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Other InformationHide

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Health Risks:

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

Internet Links for PhiloxeniteHide

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References for PhiloxeniteHide

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Reference List:

Pekov, I.V., Agakhanov, A.A., Zubkova, N.V., Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Turchkova, A.G., Sidorov, E.G. (2020) Philoxenite, (K,Na,Pb)4(Na,Ca)2(Mg,Cu)3( Al0.5)(SO4)8, a new mineral from fumarole exhalations of the Tolbachik Volcano, Kamchatka, Russia. Notes of the Russian Mineralogical Society: 149(4): 67-77.

Localities for PhiloxeniteHide

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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

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.