Vladimirivanovite (original) (raw)

A valid IMA mineral species

About VladimirivanoviteHide

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Formula:

Na6Ca2(Al6Si6O24)(SO4,S3,S2,Cl)2 · H2O

Colour:

Dark blue to ink-blue, light blue or greenish-blue to white

Crystal System:

Orthorhombic

Name:

Named in honor of Vladimir Georgievich Ivanov (Владимир Георгиевич Иванов) (1947-2002), Russian mineralogist and geochemist. He studied the lazurite deposits of the Pamirs and Pribaikalye and made significant contributions to the knowledge of the complex processes of lapis formation.

First recognized as “triclinic lazurite” (compare UM1976-26-SiOSO:AlCaClHNa) and later as “orthorhombic lazurite”; but later as an orthorhombic polytype of lazurite with a modulated structure, i.e. Lazurite-O. The modulations arise from a rotation of the sulfate tetrahedra in the sodalite cages.

Lazurite is itself probably just a sulphide-rich variety of Hauyne, or a hypothetical endmember, and the analysis of Vladimirivanovite (Handbook of Mineralogy) indicates that it is sulphate rich and thus closer to hauyne than lazurite.

Two vladimirivanovite varieties (or, possibly, two different related mineral species) can be distinguished. One of them, presumably crystallized at a relatively high temperature, has the simplified formula (Na+6.0–6.4Ca2+1.5–1.7)(Al6Si6O24)(SO42−,S3•−)1.7–1.9(CO2)0–0.1·H2O and has a deep blue color, whereas another one, with the simplified formula (Na+6.2Ca2+1.6)(Al6Si6O24)(SO42−,S4)1.6(CO2)0.1·nH2O (n > 2), is lilac and has low-temperature origin.
Three single-crystal samples studied in this work have similar commensurately modulated orthorhombic structures, with the unit-cell parameter c equal to the triple period of the basic lattice (c = 3c0), unlike triclinic slyudyankaite, with c = 2c0, and the monoclinic analog of lazurite, with c ≈ 21/3·c0. The decrease in symmetry compared to the basic cubic structure of the sodalite type is associated with the ordering of extra-framework components and the regular alternation of hosting sodalite cages of different sizes. With increasing temperature, the degree of structural order of vladimirivanovite gradually decreases until the complete disorder of the extra-framework components and the transformation of the orthorhombic unit cell into a cubic one.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:41155:8

719866d8-0a05-42f0-9998-18a411b78e6b

IMA Classification of VladimirivanoviteHide

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IMA Formula:

Na6Ca2[Al6Si6O24](SO4,S3,S2,Cl)2 · H2O

Type description reference:

Sapozhnikov, A. N., Kaneva, E. V., Cherepanov, D. I., Suvorova, L. F., Levitsky, V. I., Ivanova, L. A., Reznitsky, L. Z. (2012) Vladimirivanovite, Na6Ca2Al6Si6O242 · H2O, a new mineral of sodalite group. Geology of Ore Deposits, 54 (7) 557-564 doi:10.1134/s1075701512070070

Classification of VladimirivanoviteHide

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9.FB.10

9 : SILICATES (Germanates)
F : Tektosilicates without zeolitic H2O
B : Tektosilicates with additional anions

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 VladimirivanoviteHide

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Colour:

Dark blue to ink-blue, light blue or greenish-blue to white

Comment:

Similar colours to hauyne.

Hardness:

VHN50=575 kg/mm2 - Vickers

Density:

2.48(3) g/cm3 (Measured) 2.436 g/cm3 (Calculated)

Optical Data of VladimirivanoviteHide

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RI values:

_n_α = 1.502 - 1.507 _n_β = 1.509 - 1.514 _n_γ = 1.512 - 1.517

2V:

Measured: 63° (1), Calculated: 66°

δ = 0.010

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

Comments:

Pleochroism: Light to dark blue; absorption: Z = Y > X

Chemistry of VladimirivanoviteHide

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Mindat Formula:

Na6Ca2(Al6Si6O24)(SO4,S3,S2,Cl)2 · H2O

Crystallography of VladimirivanoviteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 9.066(3) Å, b = 12.851(3) Å, c = 38.558(10) Å

Ratio:

a:b:c = 0.705 : 1 : 3

Unit Cell V:

4,492.28 ų (Calculated from Unit Cell)

Comment:

Space group Pnaa (non-standard setting).

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Comments:

Tultui lazurite deposit, Lake Baikal area, Russia. The data are from the type description.

Geological EnvironmentHide

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Geological Setting:

Gem lazurite deposits

Type Occurrence of VladimirivanoviteHide

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General Appearance of Type Material:

Rims on lazurite, 0.01-3 mm thick, and elongated grains from 0.2-4 mm in size, and occasionally up to 15 x 20 mm. Rarely as veinlets up to 5 mm.

Place of Conservation of Type Material:

Mineralogical Museum of Saint Petersburg State University, Saint Petersburg (Russia), catalogue no. 1/19366.

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Sapozhnikov, A.N., Kaneva, E.V., Cherepanov, D.I., Suvorova, L.F., Levitsky, V.I., Ivanova, L.A., Reznitsky, L.Z. (2011) Vladimirivanovite, Na6Ca2[Al6Si6O24](SO4,S3,S2,Cl)2·H2O - a new mineral of the sodalite group. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva: 140: 36-45.

Synonyms of VladimirivanoviteHide

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Relationship of Vladimirivanovite to other SpeciesHide

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Other Members of this group:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of VladimirivanoviteHide

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Other InformationHide

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Notes:

Dissolves in HCl and HNO3 with the release of H2S.

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 VladimirivanoviteHide

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References for VladimirivanoviteHide

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Reference List:

Sapozhnikov, A. N., Kaneva, E. V., Cherepanov, D. I., Suvorova, L. F., Levitsky, V. I., Ivanova, L. A., Reznitsky, L. Z. (2012) Vladimirivanovite, Na6Ca2Al6Si6O242 · H2O, a new mineral of sodalite group. Geology of Ore Deposits, 54 (7) 557-564 doi:10.1134/s1075701512070070

Bolotina, Nadezhda B., Chukanov, Nikita V., Sapozhnikov, Anatoly N., Zubkova, Natalia V., Pekov, Igor V., Varlamov, Dmitry A., Vigasina, Marina F., Bulakh, Maria O., Yapaskurt, Vasiliy O., Ksenofontov, Dmitry A. (2024) Vladimirivanovite Revised: General Crystal Chemistry and Isomorphous Substitutions of Extra-Framework Species. Minerals, 14 (9). doi:10.3390/min14090883

Localities for VladimirivanoviteHide

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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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