Formula: La(Y,U)Fe2(Ti,Fe,Cr,V)18(O,OH,F)38
Multiple oxide, crichtonite group,
lanthanum-, yttrium-,
uranium-, titanium,
chromium and vanadium-
bearing mineral
Crystal System: Trigonal
Specific gravity: 4.42
Hardness: 6
Streak: Brownish black
Colour: Black
RADIOACTIVE
Environments
Plutonic igneous environments
Pegmatites
Carbonatites
Hydrothermal environments
Davidite-(La) occurs as a primary mineral in
high-temperature hydrothermal veins; in norite and
anorthosite; in alkalic rocks and also
granite pegmatites and carbonatites. Associated minerals include
rutile, titanite,
magnetite, ilmenite,
apatite, tourmaline,
epidote, albite and
calcite
(HOM).
Localities
At the Thackaringa District, Yancowinna county, New South Wales, Australia, a specimen has been found which is a small amount of
davidite-(La) with a bit of
anatase coating and large rutile crystals and some
quartz with a bit of mica
(AM 46.700-718).
At Crocker Well, Mt Victor Plumbago Station, Olary Province, South Australia, davidite-(La) has
been found as a black, pitchy mass associated with albite
(AM 46.700-718).
Davidite-(La) from Crocker Well - Image
At the type locality, Radium Hill mine, Radium Hill area, Olary Province, South Australia, Australia,
davidite-(La) was found in an intimate intergrowth with ilmenite and
rutile
and much black mica, with which were mixed minor amounts of
chalcopyrite and carbonates
(AM 46.700-718, AM 64.1010-1017).
Davidite-(La) from Radium Hill - Image
Back to Minerals