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| | Encyclopedia of Japanese Minerals, by Alfredo Petrov |
 | | Akita: Rare in kuroko-type deposits in the Waga-Omono district, where it occurs in the low temperature zone surrounding the sulphide ores, as euhedral platy short-prismatic crystals together with mordenite, pyrite, siderite and Mg-rich smectite, forming veinlets or disseminated aggregates. |
 | | Iwate: "Aluminian ferroanthophyllite" occurs as porphyroblastic crystals intimately associated with chamosite ("thuringite") in contact metamorphosed pelites (slates and tuffaceous slates), the hornfels aureole of the Tohno hornblende-biotite granodiorite, on Yakushi-san (Yakushiyama?) in the Miyamori district, Kitakami range. |
 | | At the Kotaki mine in the same district, more equant, thick tabular crystals to 9mm, with c, m and x-faces almost equally developed, were found on chalcopyrite, with pyrite and calcite. |
| www.petrovrareminerals.com /articles02f.html (3820 words) |
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