Tazheranite (original) (raw)

formerly given as: (Zr,Ti,Ca)O2-x

Ideal formula ZrO2, same as cubic zirconia (?)

Colour:

Yellowish orange to reddish orange, rarely cherry-red, then zoned, brownish green

Lustre:

Adamantine, Greasy

Name:

Named after its discovery locality, Tazheran (Tazheranskii) alkaline complex, Baikal Alkaline Province, Russia.

Compare also baddeleyite.
According to initial description Ti in Tazheranite is trivalent in difference from Zirkelite.

Possibly the natural form of 'cubic zirconia', although usually greatly impure compared to the synthetic gemstone.

A mineral with the name 'arkelite' was reported as isometric ZrO2 inclusions in zircon crystals. This is now regarded as synonymous with Tazheranite (Burke, 1989)

Long-form identifier:

mindat:1:1:3897:9

035c0e03-96a8-4c9c-9a16-d318cef6208e

Type description reference:

4.DL.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
L : With large (+- medium-sized) cations; fluorite-type structures

4.4.13.1

4 : SIMPLE OXIDES
4 : AX2

7.10.7

7 : Oxides and Hydroxides
10 : Oxides of Zr and Th

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

Comment:

greasy on fractures.

Colour:

Yellowish orange to reddish orange, rarely cherry-red, then zoned, brownish green

Comment:

Colour of holotype mineral is very similar to mandarin

Density:

5.01(2) g/cm3 (Measured) 4.9 g/cm3 (Calculated)

Birefringence:

Isotropic minerals have no birefringence

Anisotropism:

weak to strong anisotropism, centrally zoned.

Mindat Formula:

(Zr,Ti,Ca)(O,◻)2

formerly given as: (Zr,Ti,Ca)O2-x

Ideal formula ZrO2, same as cubic zirconia (?)

Class (H-M):

m_3_m _(_4/_m_32/m ) - Hexoctahedral

Cell Parameters:

a = 5.111(1) Å

Unit Cell V:

133.51 ų (Calculated from Unit Cell)

Comment:

Space Group: Fm3 - m.

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CIF Raw Data - click here to close

Geological Setting:

Magnesia skarns and carbonatites.

General Appearance of Type Material:

Place of Conservation of Type Material:

Mining Institute, St. Petersburg, 1094/1; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 72602, vis5748; National Museum of Natural History, Washington, D.C., USA, 145796.

Associated Minerals at Type Locality:

Reference:

Konev A.A., Ushchapovskaya Z.F., Kashaev A.A., Lebedeva V.S. (1969) Tazheranite - new calcioum-titanium-zirconium mineral, - Doklady Akademii Nauk SSSR, v.186, N4, p. 917-920.

Other Members of this group:

Associated Minerals Based on Photo Data:

Health Risks:

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

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.

- 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.