Yukonite and wallkilldellite-(Fe) were discovered at the Uriya deposit, Kiura mine, Ume, Saiki City, Oita, Japan, as first occurrences in Japan. Both minerals partly cover the surface of quartz and arsenopyrite masses and are closely associated, forming layered radiating aggregates. The layers are divided roughly into yellowishbrown and reddish-brown layers, where the former is yukonite and the latter is wallkilldellite-(Fe). The X-ray diffraction (XRD) pattern of Kiura yukonite has sharp peaks compared with that from the type locality, indicating that it is well crystalline. The empirical formula of the yukonite from electron probe microanalyzer (EPMA) analysis on the basis of As = 3 is Ca 2.31 Fe The wallkilldellite-(Fe) from the Kiura mine is very weak against heat, and the XRD pattern changes at 50°C. On the other hand, the XRD pattern of the yukonite changes at 150°C, a temperature higher than those of yukonite at other localities, indicating that it is well crystalline. We also found the signature of a structural relationship between the yukonite and wallkilldellite-(Fe) based on XRD and transmission electron microscope (TEM) observations.

34°53′N 131°52′E). Abuite is often included in aluminum phosphate rich samples, embedded with quartz and augelite and/or trolleite, and is often accompanied by other phosphates especially apatite and crandallite. Abuite is transparent and colorless with white streak and vitreous luster. It is very difficult to find them in bare eyes, since the dominant phases in aluminum phosphate rich samples, augelite, trolleite, and quartz, are all also transparent and colorless. The empirical formula of abuite (based on 10 anions pfu, O = 8, F + OH = 2) is (Ca 0.99 Sr 0.01 ) 1.00 Al 1.96 P 2.03 O 8 (F 1.89 OH 0.11 ). H 2 O was calculated by stoichiometry. The simplified formula is CaAl 2 (PO 4 ) 2 F 2 . Abuite is the calcium analogue of SrAl 2 (PO 4 ) 2 F 2 , which was synthesized by hydrothermal methods (Le Meins and Courbion, 1998). The crystal structure is orthorhombic, with space group P2 1 2 1 2 1 . Unit cell parameters refined from the obtained X-ray diffraction pattern are a = 11.818(2), b = 11.993(3), c = 4.6872(8) Å and V = 664.3(2) Å 3 , with Z = 4.

Zaïrite was found from the quartz vein penetrating into the metamorphosed mudstone of the Wazuka Unit in Ishidera area, Wazuka-cho, Kyoto Prefecture, Japan, which is the first occurrence in Japan. Zaïrite occurs as bright-yellow granular crystals (20-30 µm) in a cavity formed by the leaching of fluorapatite with native bismuth inclusion. The chemical composition of zaïrite from Ishidera was closer to the ideal chemical composition, comparing with the zaïrite from type locality including Al. The empirical formula from electron probe microanalyzer (EPMA) analysis on the basis of O = 8, OH − = 6 was (Bi 0.70 Ca 0.23 ) Σ0.93 Fe 3+2.91 (P 2.04 S 0.09 O 8 )(OH) 6 . The unit cell parameters obtained from the X-ray diffraction (XRD) pattern were a = 7.311(3) Å and c = 16.407(7) Å, larger than the type locality due to difference in chemical composition.