Alumovesuvianite (original) (raw)

A valid IMA mineral species

About AlumovesuvianiteHide

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Formula:

Ca19AlAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9

The formula is a partial simplification of the full structural formula. The large (VII-IX)-coordinated (X4)2(X3)8(X2)8(X1) sites are here combined (e.g. Ca19) and are typically filled with Ca, although other large cations such as the REE may be present. The square-pyramidal Y1 site can host a variety of M2+ and M3+ ions and is the basis for the distinction of several species. The VI-coordinated Y2 site typically is filled with Al, whereas the also VI-coordinated Y3 site may contain Al, Mg, and other cations of similar charge and size. The tetrahedral T1 site is typically vacant but may contain B (less commonly Al); the trigonal T2 site is also typically vacant but may also contain B. Some of the (SiO4) may be replaced by (H4O4), akin to the Si4+ ↔︎ 4H+ hydrogarnet substitution. Among the oxygen that are not part of the silica tetrahedra, there are eight "O11" that typically occur as OH, two "O10" that are typically O & OH or OH & OH (the latter arrangement notably when Y1 is an M2+ cation). There may also be up to three "O12" that in most vesuvianite-group minerals are absent (and are not included here), but may be present particularly when T1 is occupied.

Crystal System:

Tetragonal

Name:

The name alumovesuvianite is given to highlight the species-defining role of Al.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:47914:5

4100eb63-df2d-47a5-a052-514896ad2cff

IMA Classification of AlumovesuvianiteHide

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IMA Formula:

Ca19Al(Al10Mg2)Si18O69(OH)9

Type description reference:

Panikorovskii, Taras L., Chukanov, Nikita V., Aksenov, Sergey M., Mazur, Anton S., Avdontseva, Evgenia Yu, Shilovskikh, Vladimir V., Krivovichev, Sergey V. (2017) Alumovesuvianite, Ca19Al(Al,Mg)12Si18O69(OH)9, a new vesuvianite-group member from the Jeffrey mine, asbestos, Estrie region, Québec, Canada. Mineralogy and Petrology, 111 (6) 833-842 doi:10.1007/s00710-017-0495-1

Classification of AlumovesuvianiteHide

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9.BG.

9 : SILICATES (Germanates)
B : Sorosilicates
G : Sorosilicates with mixed SiO4 and Si2O7 groups; cations in octahedral [6] and greater coordination

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 AlumovesuvianiteHide

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Density:

3.31 g/cm3 (Measured)

Optical Data of AlumovesuvianiteHide

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RI values:

_n_ω = 1.725(2) _n_ε = 1.722(2)

δ = 0.003

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

Chemistry of AlumovesuvianiteHide

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Mindat Formula:

Ca19AlAl4(Al6Mg2)(◻4)◻[Si2O7]4[(SiO4)10]O(OH)9

The formula is a partial simplification of the full structural formula. The large (VII-IX)-coordinated (X4)2(X3)8(X2)8(X1) sites are here combined (e.g. Ca19) and are typically filled with Ca, although other large cations such as the REE may be present. The square-pyramidal Y1 site can host a variety of M2+ and M3+ ions and is the basis for the distinction of several species. The VI-coordinated Y2 site typically is filled with Al, whereas the also VI-coordinated Y3 site may contain Al, Mg, and other cations of similar charge and size. The tetrahedral T1 site is typically vacant but may contain B (less commonly Al); the trigonal T2 site is also typically vacant but may also contain B. Some of the (SiO4) may be replaced by (H4O4), akin to the Si4+ ↔︎ 4H+ hydrogarnet substitution. Among the oxygen that are not part of the silica tetrahedra, there are eight "O11" that typically occur as OH, two "O10" that are typically O & OH or OH & OH (the latter arrangement notably when Y1 is an M2+ cation). There may also be up to three "O12" that in most vesuvianite-group minerals are absent (and are not included here), but may be present particularly when T1 is occupied.

Crystallography of AlumovesuvianiteHide

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Crystal System:

Tetragonal

Class (H-M):

4/m - Dipyramidal

Cell Parameters:

a = 15.5103(2) Å, c = 11.8096(1) Å

Morphology:

Prismatic tetragonal crystals. Dominant crystal forms are {100}, {110}, {210}, {111}, {101} and {001}.

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of AlumovesuvianiteHide

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General Appearance of Type Material:

As prismatic tetragonal crystals up to 4 × 4 × 6 mm3 in size encrusting walls of cavities in a granular diopside.

Place of Conservation of Type Material:

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration numbers 4829/1 (holotype) and 4829/2 (cotype)

Empirical Formula of Type Material:

Ca19.00(Al0.92Fe3+0.08)Σ1.00(Al9.83Mg1.80Mn3+0.25)Σ11.88Si17.98O69.16(OH)8.44

Chemical Analysis of Type Material:

Geological Setting of Type Material:

In the rodingite zone at the contact of a gabbroid rock with host serpentinite.

Associated Minerals at Type Locality:

Reference:

Panikorovskii, T.L., Chukanov, N.V., Aksenov, S.M., Mazur, A.S., Avdontseva, E.Yu., Shilovskikh, V.V., Krivovichev, S.V. (2017): Alumovesuvianite, Ca19Al(Al,Mg)12Si18O69(OH)9, a new vesuvianite-group member from the Jeffrey mine, asbestos, Estrie region, Québec, Canada. Mineralogy and Petrology: 111: 833–842.

Synonyms of AlumovesuvianiteHide

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Relationship of Alumovesuvianite to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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IR Spectrum:

The most intense IR absorption bands lie in the ranges 412–609, 897–1024, and 3051–3671 cm−1.

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 AlumovesuvianiteHide

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References for AlumovesuvianiteHide

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Reference List:

Panikorovskii, Taras L., Chukanov, Nikita V., Aksenov, Sergey M., Mazur, Anton S., Avdontseva, Evgenia Yu, Shilovskikh, Vladimir V., Krivovichev, Sergey V. (2017) Alumovesuvianite, Ca19Al(Al,Mg)12Si18O69(OH)9, a new vesuvianite-group member from the Jeffrey mine, asbestos, Estrie region, Québec, Canada. Mineralogy and Petrology, 111 (6) 833-842 doi:10.1007/s00710-017-0495-1

Panikorovskii, T.L., Chukanov, N.V., Rusakov, V.S., Shilovskikh, V.V., Mazur, A.S., Balassone, G., Ivanyuk, G.Y., Krivovichev, S.V. (2017) Vesuvianite from the Somma-Vesuvius Complex: New Data and Revised Formula. Minerals: 7: 248; doi:10.3390/min7120248

Panikorovskii, Taras L., Chukanov, Nikita V., Aksenov, Sergey M., Mazur, Anton S., Avdontseva, Evgenia Yu, Shilovskikh, Vladimir V., Krivovichev, Sergey V. (2017) Alumovesuvianite, Ca19Al(Al,Mg)12Si18O69(OH)9, a new vesuvianite-group member from the Jeffrey mine, asbestos, Estrie region, Québec, Canada. Mineralogy and Petrology, 111 (6) 833-842 doi:10.1007/s00710-017-0495-1

Chukanov, Nikita V., Panikorovskii, Taras L., Goncharov, Alexey G., Pekov, Igor V., Belakovskiy, Dmitriy I., Britvin, Sergey N., Möckel, Steffen, Vozchikova, Svetlana A. (2019) Milanriederite, (Ca,REE)19Fe3+Al4(Mg,Al,Fe3+)8Si18O68(OH,O)10, a new vesuvianite-group mineral from the Kombat Mine, Namibia. European Journal of Mineralogy, 31 (3) 637-646 doi:10.1127/ejm/2019/0031-2856

Localities for AlumovesuvianiteHide

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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.