plagioclase

plagioclase
[ˈpleɪdʒɪə(ʊ)kleɪz, ˈplagɪəʊ-]
(亦作 plagioclase feldspar)
noun
  1. [mass noun]a form of feldspar consisting of aluminosilicates of sodium and/or calcium, common in igneous rocks and typically white
    斜长岩
语源
  1. mid 19th cent.: from plagio- 'oblique' + Greek klasis 'cleavage' (because originally characterized as having two cleavages at an oblique angle)
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