Tsaregorodtsevite (original) (raw)

A valid IMA mineral species

About TsaregorodtseviteHide

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Formula:

(N(CH3)4)(AlSi5O12)

Colour:

Colourless to white

Crystal System:

Orthorhombic

Name:

Named after Sergei Vasil'evich Tsaregorodtsev (Сергей Васильевич Царегородцев) (1953-1986), Russian mineral collector of the Urals.

Sodalite Group. The mineral contains (as the only one known) the tetramethylammonium ion, [N(CH3)4]+.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:4034:7

77c00846-687a-4f60-82c5-f8f814036161

IMA Classification of TsaregorodtseviteHide

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IMA Formula:

N(CH3)4Si4(SiAl)O12

Type description reference:

Classification of TsaregorodtseviteHide

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9.FB.10

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

76.2.3.8

76 : TECTOSILICATES Al-Si Framework
2 : Al-Si Framework Feldspathoids and related species

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 TsaregorodtseviteHide

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Colour:

Colourless to white

Hardness:

VHN120=796 - 893 kg/mm2 - Vickers

Density:

2.04(5) g/cm3 (Measured) 2.01 g/cm3 (Calculated)

Optical Data of TsaregorodtseviteHide

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RI values:

_n_α = 1.529(2) _n_γ = 1.531(2)

δ = 0.002

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

Chemistry of TsaregorodtseviteHide

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Mindat Formula:

(N(CH3)4)(AlSi5O12)

Crystallography of TsaregorodtseviteHide

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Crystal System:

Orthorhombic

Class (H-M):

222 - Disphenoidal

Cell Parameters:

a = 8.984(3) Å, b = 8.937(2) Å, c = 8.927(2) Å

Ratio:

a:b:c = 1.005 : 1 : 0.999

Unit Cell V:

716.75 ų (Calculated from Unit Cell)

Twinning:

Commonly sector twinned, as seen in thin section.

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Radiation - Copper Kα

Data Set:

Data courtesy of RRUFF project at University of Arizona, used with permission.

Powder Diffraction Data:

Comments:

very close to ammonian sodalite

Geological EnvironmentHide

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Type Occurrence of TsaregorodtseviteHide

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General Appearance of Type Material:

Pseudocubic crystals, to 1 cm

Place of Conservation of Type Material:

Mining Institute, St. Petersburg, 2054/1; Il'menskii Preserve Museum, Miass, 3303, 3374, 5121; Vernadsky Geological Museum, Moscow, 59719, 59859; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 87949; National Museum, Sofint5a, Bulgaria; National Museum, Prague, Czech Republic.

Reference:

Pautov, L.A., Karpenko, V.Y., Sokolova, E.V., Ignatenko, K.I. (1993) Tsaregorodtsevite N(CH3)4[Si2(Si0.5Al0.5)O6]2 — a new mineral. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 128(1): 128-135.

Synonyms of TsaregorodtseviteHide

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Other Language Names for TsaregorodtseviteHide

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Relationship of Tsaregorodtsevite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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Thermal Behaviour:

Evolves ammonia and eurotropine above 600°C, becoming pitch-black.

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 TsaregorodtseviteHide

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References for TsaregorodtseviteHide

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Reference List:

Sherriff, B.L., Sokolova, E.V., Cramer, J., Kunath-Fandrei, G., Jäger, C., Pautov, L.A. (1997) Changes in the crystal structure of tsaregorodtsevite [N(CH3)4][Si2(Si0.5Al0.5)O6]2 on heating. American Mineralogist: 82: 405-415.

Localities for TsaregorodtseviteHide

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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.