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Bariopyrochlore (of Hogarth 1977)

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Formula:
A2Nb2(O,OH)6Z
Lustre:
Vitreous, Resinous
Hardness:
4½ - 5
Specific Gravity:
3.85 - 4.15
Crystal System:
Isometric
Name:
First described as pandaite by Jäger et al. (1958). The name was replaced with bariopyrochlore by the IMA Committee on pyrochlore nomenclature (Hogarth 1977) for the predominant barium content and membership in the pyrochlore group (sensu lacto). Descredited by IMA 2012 (Atencio et al. 2013, 2012 IMA Report) = a zero valent dominant member of Pyrochlore Group.
This page provides mineralogical data about Bariopyrochlore (of Hogarth 1977).


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References for Bariopyrochlore (of Hogarth 1977)Hide

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Jäger, E., Niggli, E. and van der Veen, A. H. (1959): A hydrated barium-strontium pyrochlore in a biotite rock from Panda Hill, Tanganyika. Mineralogical Magazine 32, 10-25. - American Mineralogist (1959), 44, 1324 (abstract).
Harris, P. M. (1965): Pandaite [= bariopyrochlore] from the Mrima Hill niobium deposit (Kenya). Mineralogical Magazine 35, 277-290.
Hogarth, D. D. (1977): Classification and nomenclature of the pyrochlore group. American Mineralogist 62, 403-410, esp. 407.
Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 42
Atencio D., Andrade M.B., Christy A.G., Giere R., Kartashov P.M. (2010): The pyrochlore supergroup of minerals: nomenclature. Canadian Mineralogist: 48: 569-594.
Christy, A.G., Atencio, D. (2013) Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine: 77: 13-20

Internet Links for Bariopyrochlore (of Hogarth 1977)Hide

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