dipyre

…It is also called pillar stone. It is expressed as Me _x ( x = 0 to 100) according to the percentage of Me component, Me ₀ to Me ₂₀ is called marialite, Me ₂₀ to Me ₅₀ is called dipyre, Me ₅₀ to Me ₈₀ is called mizzonite, and Me ₈₀ to Me ₁₀₀ is called meionite. It is an alumino-tectosilicate that is mainly produced in the contact alteration zone of metamorphic rocks and limestone. …

*Some of the terminology explanations that mention "dipyre" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…柱石ともいう。Me成分の割合に応じてMe_x(x＝0～100)で表し，Me₀～Me₂₀をマリアライト，Me₂₀～Me₅₀をディパイヤdipyre,Me₅₀～Me₈₀をミッゾナイトmizzonite,Me₈₀～Me₁₀₀をメイオナイトと呼ぶ。主として変成岩，石灰岩の接触変質帯に産出するアルミノテクトケイ酸塩である。…

※「dipyre」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報