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Calciotantite

A valid IMA mineral species
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The name alludes to theCALCIum content and its chemical relationship toTANTITE.
Type Locality:
ⓘVasin-Myl'k Mt, Voron'i Tundry, Murmansk Oblast, Russia
See also the discreditedungursaite.


Unique Identifiers
First published:
1982
Type description reference:
Voloshin, A.V., Pakhomovskii, Y.A., Tysheva, F.M. (1982) Calciotantite, CaTa4O11 - a new mineral from granitic pegmatites of the Kola Peninsula. Mineralogiceskij Zhurnal: 4: 75-79.

Classification of Calciotantite

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
J : With large (+- medium-sized) cations; polyhedral frameworks
Dana 8th ed.:
8.6.2.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
6 : (AB)6O11·nH2O
Hey's CIM Ref.:
18.1.9

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Mineral Symbols
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
6½ onMohs scale
Hardness:
VHN20=1200 kg/mm2 - Vickers
Cleavage:
None Observed
Density:
7.46 g/cm3 (Measured)    6.735 g/cm3 (Calculated)
Comment:
(Nb rich) to 7.40

Optical Data of Calciotantite

Crystallography of Calciotantite
General Appearance of Type Material:
Calciotantite occurs as square to rectangular to hexagonal crystals 0.03-0.05 mm as inclusions in microlite or as veinlets 0.1-0.3 mm in microlite.
Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, number 5702/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, number 81392.
Geological Setting of Type Material:
In the albite-spodumene zone of granite pegmatites.
Associated Minerals at Type Locality:
AlbiteApatiteMicrolite GroupScheeliteWodginite
Reference:
Voloshin, A.V., Pakhomovskii, Y.A., Tysheva, F.M. (1982) Calciotantite, CaTa4O11 - a new mineral from granitic pegmatites of the Kola Peninsula. Mineralogiceskij Zhurnal: 4: 75-79.

Synonyms of Calciotantite

Other Language Names for Calciotantite

Relationship of Calciotantite to other Species
Other Members of Natrotantite Group:
IrtyshiteNa2(Ta,Nb)4O11Hex.
NatrotantiteNa2Ta4O11Trig.3m(32/m) :R3c

Common AssociatesHex.4.DJ.05NatrotantiteNa2Ta4O11Trig.3m(32/m) :R3c

Fluorescence of Calciotantite

Other Information
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    • References for CalciotantiteⓘMount CassiteriteSweetapple et al. (2001)
    DR Congo
     
    Voloshin A.V. (1988)
    Kazakhstan
     
    Pekov (1998)
    Russia (TL)
     
    Voloshin et al. (1982)+1 other reference
    Sweden
     
    Smeds et al. (1999)+1 other referenceCooper+1 other reference
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