Mindat Logo

Betafite Group

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Oxyuranobetafite
Luna 24 landing site, Mare Crisium, The Moon
© Pavel M. Kartashov




Formula:
A
 
2
(Ti,Nb)
 
2
O
 
6
Z
A is primarily Ca or U4+ but can also be Na, Sn2+, Sr, Pb2+, Sb3+, Y, H2O or ◻.

Z is primarily O, but can also be OH, F, H2O or ◻
Member of:Pyrochlore Supergroup
Name:Betafite the species, was named in 1912 by Antoine François Alfred Lacroix for the "type" locality. Betafite was redefined in 1961, by Donald D. Hogarth and, betafite remained a species, but frequently with "anomalous" chemistry. Lumpkin and Ewing (1996) studied nine specimens historically labeled "betafite" and discovered that replacement and alteration was present in their samples. Titanium-rich minerals intergrown with pyrochlore super group crystals gave a false impression of the bulk chemistry of specimens. Atencio, et al. (2010)reported on the IMA-approved supergroup nomenclature and Christy and Atencio (2013) added corrections to the IMA report.

The result of modern pinpoint analyses is that almost all specimens formerly labeled betafite are no longer members of that group/series. New analyses, including determination of H2O, OH, and F are necessary to identify the species of a particular sample. The root-name, betafite, was retained for historical reasons.


The nomenclature was recently revised by Atencio et al. (2010); see also Christy & Atencio (2013). The reason "betafite group" species are so scarce when they previously seemed to be widespread is that many erstwhile "betafite group" specimens, particularly large crystals from Madagascar, were partially intergrown with rutile and several rare titanium-rich species. Chemical analyses of bulk specimens showed an erroneously high titanium content due to inclusions.

Classification of Betafite Group

mindat.org URL:http://www.mindat.org/min-29178.html
Please feel free to link to this page.

Chemical Properties of Betafite Group

Formula:
A
 
2
(Ti,Nb)
 
2
O
 
6
Z


A is primarily Ca or U4+ but can also be Na, Sn2+, Sr, Pb2+, Sb3+, Y, H2O or ◻.

Z is primarily O, but can also be OH, F, H2O or ◻
Simplified for copy/paste:A2(Ti,Nb)2O6Z

Relationship of Betafite Group to other Species

Member of:Pyrochlore Supergroup
Other Members of Group:

- +
Group Members:
Oxycalciobetafite
Ca
 
2
(Ti,Nb)
 
2
O
 
6
O
Oxyuranobetafite
(U,Ca,◻)
 
2
(Ti,Nb)
 
2
O
 
6
O

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 Betafite Group

Reference List:

- +
Hogarth, Donald D.(1961): A Study of Pyrochlore and Betafite. Canadian Mineralogist. 6: 610-633.

Lumpkin, Gregory R. and Ewing, Rodney C.(1996) : Geochemical alteration of pyrochlore group minerals: Betafite subgroup. American Mineralogist. 81: 1237-1248.

Atencio Daniel, Andrade M. B., Christy A. G., Giere R., Kartashov Pavel M. (2010): The pyrochlore supergroup of minerals: nomenclature. Canadian Mineralogist. 48: 673-698.

Christy, A. G. and Atencio, Daniel (2013): Clarification of status of species in the pyrochlore supergroup. Mineralogical Magazine. 77: 13-20.

Internet Links for Betafite Group

Search Engines:
  • Look for Betafite Group on Google
  • Look for Betafite Group images on Google
  • Mineral Dealers:
  • Fabre Minerals - search for Betafite Group specimens
  • Buy from David K Joyce minerals
  • Fine minerals from bisbeeborn.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • The Arkenstone - Fine Minerals
  • Buy RARE Minerals from Rocks of Africa
  • Betafite Group specimens for sale - minfind.com
  • rare and unusual minerals mainly crystallized
  • Rare and Unusual minerals at Mineralogical Research Company
  • Search for Betafite Group on Well-Arranged Molecules
  • Fine and rare minerals from mintreasure.com
  • Jobs:
  • Mining & Geology Jobs
  • Localities for Betafite Group

    The 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.
    Mineral and/or Locality  
    Search Google  
    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
    Current server date and time: March 24, 2014 14:18:23
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds