Inyoite was found as fissure fillings in calcium borate minerals, which occur as an irregularly shaped body in the crystalline limestone near the gehlenite spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. Inyoite occurs as aggregates of tabular crystals up to 1 mm wide, and rarely as euhedral crystals up to 0.5 mm wide in fissures of calcium borate minerals such as nifontovite, pentahydroborite, sibirskite and parasibirskite. The fissure fillings are composed only of inyoite. This is the first finding of inyoite in Japan. The type of occurrence is also different from those in many other localities in the world. Electron microprobe and CHNS / O analyses gave the empirical formula Ca It is likely that the inyoite at the Fuka mine was formed by a reaction of ground water with calcium borate minerals at a temperature of around 20˚C.

Zálesíite is found to exist as hexagonal prismatic crystals (length: up to 1 mm; width: 10 µm) and fibrous aggregates in the alteration zone in crystalline limestone near gehlenite -spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. The mineral is pale green to emerald green in color with a silky to vitreous luster. Andradite, aragonite, bornite, cahnite, chalcocite, chalcopyrite, conichalcite, johnbaumite, and an unidentified Ca -Cu arsenate mineral coexist in the abovementioned limestone. From SEM -EDS analysis, the empirical formula of zále-síite is found to be (Ca , and Z = 2. It is inferred that zálesíite is formed by the reaction between crystalline limestone, cahnite, johnbaumite, Cu sulfide, and a Bi -rich hydrothermal solution.

Priceite was found as a mass or a veinlet in crystalline limestone associated with gehlenite-spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. Priceite occurs as grayish white or pale green aggregates of anhedral or prismatic crystals up to 0.5 mm in length in association with shimazakiite, sibirskite, uralborite and calcite. An electron microprobe analysis of priceite gave an empirical formula (Ca O based on O = 13. The unit cell parameters are a = 11.633(7), b = 6.977(3), c = 12.342(5) Å, β = 110.648(7)°. The calculated density is 2.486 g cm −3 . It is likely that priceite from the Fuka mine was formed as a secondary mineral by a late-hydrothermal alteration of shimazakiite at temperature between 100 and 190°C or less.

Calciborite was found as a veinlet or a mass in crystalline limestone associated with gehlenite -spurrite skarns at the Fuka mine, Okayama Prefecture, Japan. Calciborite occurs as milky white aggregates up to 1 mm in diameter with shimazakiite, fluorite, bornite and calcite. An electron microprobe analysis of calciborite gave an empirical formula (Ca 0.999 , respectively. The calciborite from the Fuka mine was probably formed by a reaction of boron -bearing fluids with limestone at a temperature between 250 and 300 °C.

Talmessite was found in veinlets (approximately 1 mm wide) cutting into massive limonite in the oxidized zone of the Uriya deposit, Kiura mining area, Oita Prefecture, Japan. It occurs as aggregates of granular crystals up to 10 μm in diameter and as botryoidal aggregates up to 0.5 mm in diameter, in association with arseniosiderite, and aragonite. The talmessite is white to colorless, transparent, and has a vitreous luster. The unit -cell parameters refined from powder X -ray diffraction patterns are a