The main U minerals at the Olympic Dam are coffinite, brannerite, and uraninite-pitchblende, with minor to trace amounts of U hosted in hematite, thorite-uranothorite, thorianite, crandallite
, xenotime-(Y), zircon, REE-group minerals, pyrite, chalcopyrite, bornite, and chalcocite .
The positive correlation between pairs of Sr-[P.sub.2][O.sub.5] (r = 0.82) and Sr-Ca (r = 0.73) may be suggestive of likely hosting of crandallite
mineral group for Sr.
Rasmussen, "Early-diagenetic REE-phosphate minerals (florencite, gorceixite, crandallite
, and xenotime) in marine sandstones: a major sink for oceanic phosphorus," American Journal of Science, vol.
The specimen is made up mostly of yellow material (crandallite
) in which are embedded several small nodules of green variscite (Larsen and Shannon, 1930).
Palmer B, Gilkes RJ (1982) Reversion of calcined calcium aluminium phosphate fertilizers due to rehydroxylation of crandallite
. Australian Journal of Soil Research 20, 243-250.
The mineral (accompanied by crandallite
, its alteration product) forms free-standing, doubly terminated crystals to 1 cm, in aggregates associated with manganese and iron carbonates (siderite, ankerite, rhodochrosite) or quartz.
Bolland MDA, Allen DG (1987) Comparison of three soil tests for phosphate on lateritic soil fertilised with superphosphate, crandallite
rock phosphates and apatite rock phosphates.
The minor amounts of crandallite
and millisite in Christmas Island A-ore became amorphous.
Relationship to other species: It is a member of the crandallite
group and the [Fe.sup.3+]-dominant analogue of arsenoflorencite-(Ce), Ce[Al.sub.3](As[O.sub.4])[.sub.2](OH)[.sub.6].
Llallagua phosphates, including childrenite, crandallite
, fluorapatite, metavauxite, monazite, paravauxite, sigloite, vauxite, vivianite and wavellite, were actively collected by Bandy.
Other minerals present in attractive, smaller crystals or coatings include cacoxenite, crandallite
, dufrenite, gypsum, jarosite, native selenium and strengite/variscite.