Unnamed (Ba-analogue of Calcioaravaipaite)
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About Unnamed (Ba-analogue of Calcioaravaipaite)
Formula:
~BaCa2Al(F,OH)9
First Recorded Locality:
Appears to be the Ba analogue of calcioaravaipaite.
White globular, fine-grained to fibrous aggregates with a pearly lustre. Only a few small micromount-sized specimens are known. Some samples show an association with usovite.
Described by Kolitsch (1997) very briefly as an unidentified Ba-Ca-Al-fluoride; later recognised as being the Ba analogue of calcioaravaipaite (Kolitsch et al. 2007).
Subsequently, further samples were identified and the mineral has been synthesised and its structure solved. Work is ongoing to describe the mineral as a new species (Kolitsch et al., in prep., 2010-2026).
The mineral from Russia, supposed to be BaCa2AlF9, occurs as intergrowths with fluorite aroud weberite grains, in a single fluoroaluminate segregation within aegirine-arfvedsonite aggregates; the presence/absence of OH and water in thiis phase could not be confirmed. Compare the associated 'Unnamed (Ba-Al Fluoride Hydroxide)'.
White globular, fine-grained to fibrous aggregates with a pearly lustre. Only a few small micromount-sized specimens are known. Some samples show an association with usovite.
Described by Kolitsch (1997) very briefly as an unidentified Ba-Ca-Al-fluoride; later recognised as being the Ba analogue of calcioaravaipaite (Kolitsch et al. 2007).
Subsequently, further samples were identified and the mineral has been synthesised and its structure solved. Work is ongoing to describe the mineral as a new species (Kolitsch et al., in prep., 2010-2026).
The mineral from Russia, supposed to be BaCa2AlF9, occurs as intergrowths with fluorite aroud weberite grains, in a single fluoroaluminate segregation within aegirine-arfvedsonite aggregates; the presence/absence of OH and water in thiis phase could not be confirmed. Compare the associated 'Unnamed (Ba-Al Fluoride Hydroxide)'.
Unique Identifiers
Mindat ID:
29129
Long-form identifier:
mindat:1:1:29129:1
Chemistry of Unnamed (Ba-analogue of Calcioaravaipaite)
Mindat Formula:
~BaCa2Al(F,OH)9
Element Weights:
First Recorded Occurrence of Unnamed (Ba-analogue of Calcioaravaipaite)
Common Associates
Associations Based on Photo Data:
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Unnamed (Ba-analogue of Calcioaravaipaite)
mindat.org URL:
https://www.mindat.org/min-29129.html
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References for Unnamed (Ba-analogue of Calcioaravaipaite)
Reference List:
Localities for Unnamed (Ba-analogue of Calcioaravaipaite)
Showing 2 localities.
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The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Germany (FRL) | |
| Uwe Kolitsch & Joachim Gröbner (powder X-ray diffraction + SEM-EDS) +1 other reference |
Russia | |
| Starikova et al. (2015) |
Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany