webmineral.com/data/Churchite-%28Dy%29.shtmlChurchite-(Dy) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 575.84 ±143.96 grams of pure Churchite-(Dy) .
www.mindat.org/gm/1047This is the most amazing specimen of churchite-Y that I've ever seen. A cavity approx 22mm by 10mm is completely filled with a mass of white and pale tan churchite crystals to ~1mm.
www.sciencedirect.com/science/article/pii/S1464343X20302259Churchite from the GBO unit of the Badamlu bauxite deposit is characterized by low contents of Gd (2.0–3.5 wt%) and Dy (3.8–6.4 wt%), and Ce, Nd, and Er were not detected. This indicates that chuchite in the Badamlu bauxite deposit is of churchite-(Dy) type.
advances.sciencemag.org/content/advances/6/41/eabb6570.full.pdfelevated Dy contents (Table 2). Bastnäsite occurs mainly as elongate crystals with La-rich cores and Dy-rich rims (Fig. 2D). Run CbSi differs from CbX by the lack of sellaite and hematite and much higher capsule-derived Ni contents in the hydrothermal carbonates, resulting from the incorporation of Mg and Fe into early-
en.wikipedia.org/wiki/Phosphate_mineralPhosphate minerals contain the tetrahedrally coordinated phosphate (PO 4 3−) anion along sometimes with arsenate (AsO 4 3−) and vanadate (VO 4 3−) substitutions. Chlorine (Cl −), fluorine (F −), and hydroxide (OH −) anions that also fit into the crystal structure.. The phosphate class of minerals is a large and diverse group, however, only a few species are relatively common.