Up to 60% of the REE, P, halogens, and U in basalt 75055 and basalt mineral separates, KREEP-rich breccia 14312, and components from highland breccia 66095 are in phases that are rapidly dissolved by pH1 HNO3 acid; these could be phosphates. The REE patterns of the pH1 acid soluble fractions are distinctly different from those of the postleach residues. The REE patterns of the dilute acid soluble fractions in the breccia samples are similar. The basalt samples also have similar acid soluble REE patterns but different from the breccia samples. Significant fractions of P (25%), LREE (40%), and HREE (16%) in whole rock basalt are ph1 acid soluble. Large fractions of P (47% and 61%) and small fractions of LREE (10%) associated with plagioclase and pyroxene mineral separates are acid soluble. Thus for this igneous rock, the acid soluble phases associated with the whole rock and with the major minerals may be different.