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orthopyroxene
/ ˌɔːθəʊpaɪˈrɒksiːn /
noun
- a member of the pyroxene group of minerals having an orthorhombic crystal structure, such as enstatite and hypersthene
orthopyroxene
/ ôr′thə-pī-rŏk′sēn′ /
- Any variety of the mineral pyroxene that crystallizes in the orthorhombic system and contains no calcium and little or no aluminum. Enstatite is an orthopyroxene.
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