Definition: It is a rule specifying the orientation of alternating lamellae in multiple twinfeldspar crystals; the twinning plane is brachypinacoid and is common in albite.鈉長(zhǎng)石雙晶律nà cháng shí shuāng jīng lǜalbite: a widely distributed rock-forming feldspar......(本文共 380 字) [閱讀本文] >>