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Unnamed (Ba-Al Fluoride Hydroxide)

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Formula:
BaAlF4(OH)
Said to be a possible Ba analogue of jakobssonite. Found within a single fluoroaluminate segregation in aegirine-arfvedsonite granites, with usovite and likely together with 'Unnamed (Ba-analogue of Calcioaravaipaite)', among others. Seem to be or primary origin. Other associates: cryolite, fluorite, pachnolite, prosopite, thomsenolite, weberite.

Occurs as prismatic or splintery grains, containing up to 5.5-6 wt.% oxygen. Suggested to be the alpha or beta polymorph.

Compare Unnamed (Barium-Strontium Aluminium Fluoride), BaAlF5.


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Unique IdentifiersHide

Mindat ID:
47680
Long-form identifier:
mindat:1:1:47680:1

Chemistry of Unnamed (Ba-Al Fluoride Hydroxide)Hide

Mindat Formula:
BaAlF4(OH)
Element Weights:
Element% weight
Ba53.370 %
F29.534 %
Al10.486 %
O6.218 %
H0.392 %

Calculated from ideal end-member formula.
Elements listed:
Al, Ba, F, H, O - search for minerals with similar chemistry

Other InformationHide

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-Al Fluoride Hydroxide)Hide

References for Unnamed (Ba-Al Fluoride Hydroxide)Hide

Localities for Unnamed (Ba-Al Fluoride Hydroxide)Hide

This 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.

Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Russia
 
  • Zabaykalsky Krai
    • Kalarsky District
Starikova et al. (2015)
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