Abstract: Eluvial pebbles from the Afu Hills, Nigeria, are largely composed of fluocerite, Ce_0.50La_0.28Nd_0.11 Pr_0.04Th_0.03Ca_0.02F₃, with minor monazite. The fluocerite shows two types of alteration, to bastnäsite, and to bastnäsite-(La) with cerianite. Electron microprobe analyses are given for fluocerite, monazite, bastnäsite and bastnäsite-(La). The refined cell parameters of the fluocerite are a = 7.130±0.001, c = 7.298₅ ± 0.001 Å. Strongest lines are 3.204 Å (100), 3.65 (45), 2.059 (45), 2.010 (45) and 3.56₅ (40). Space group P 6₃/mcm, Z = 6, D_calc. = 6.12 g cm⁻³, ω = 1.613, ε = 1.609 both ±0.002, uniaxial negative. For bastnäsite a = 7.131 ± 0.002, c = 9.786±0.004 Å, for cerianite a = 5.46₀ ± 0.005 Å.