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Ungursaite

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Formula:
NaCa
 
5
(Ta,Nb)
 
24
O
 
65
(OH)
System:HexagonalColour:Colourless
Lustre:AdamantineHardness:7


Natrotantite Group.

Originally reported from Ungursai Ta Deposit, Irtysh River, Kalba Range, Shyghys Qazaqstan Oblysy (Vostochno-Kazakhstanskaya [Eastern-Kazakhstan] Oblast'), Kazakhstan.

Classification of Ungursaite

IMA status:Discredited 1988
Explanation of status:name discredited in favour of calciotantite CNMMN (1988)
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Physical Properties of Ungursaite

Lustre:Adamantine
Diaphaneity (Transparency):Transparent
Colour:Colourless
Hardness (Mohs):7

Crystallography of Ungursaite

Crystal System:Hexagonal

Chemical Properties of Ungursaite

Formula:
NaCa
 
5
(Ta,Nb)
 
24
O
 
65
(OH)
Essential elements:Ca, H, Na, O, Ta
All elements listed in formula:Ca, H, Na, Nb, O, Ta

Relationship of Ungursaite to other Species

Structurally related to group(s):
Natrotantite Group

Other Names for Ungursaite

Other Languages:
German:Ungursait
Russian:Унгурсаит
Spanish:Ungursaita

Other Information

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

References for Ungursaite

Reference List:

- +
Mineral. Zhurnal, Kiev (1985): 7(4): 88.

American Mineralogist (1986): 71: 1546 (abs).

Soviet Physics – Crystallography (1988): 33: 498.

Internet Links for Ungursaite

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    • Localities for Ungursaite

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Kazakhstan
     
    • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
      • Kalba Range
        • Irtysh River
    		American Mineralogist (1986): 71: 1546
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