Host: Japan Association of Mineralogical Sciences
Momoi and Yoshimura(1964) found a goldmanite(Ca3V2Si3O12)-Mn-V-garnet series garnet from Yamato mine in Kagoshima Pref. Japan. They proposed a new mineral Yamatoite(Mn3V2Si3O12 ). However, this garnet was not approved by IMA, because the site occupancy of Mn is less than Ca. A garnet from the Kurase mine is greenish-yellow in color. And grain diameter is smaller than 0.1mm. Greenish-yellow garnets have 3 types, euhedral crystal, vein and indeterminate form. Associated minerals are Mn-calcite-tephroite, Ca-rhodochrosite and Ca-rhodochrosite-tephroite-vuorelainenite, respectively. Occurence of associated minerals are indicative of order of crystallization. First, greenish garnet was crystallized out. Next it was dissolve. Finally Ca-Al rich garnet was resorption overgrowth. I will reported the result of synthetic experiment of Mn-V bearing garent in this study.
