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单词 euhedral
释义

Definition of euhedral in English:

euhedral

adjective juːˈhiːdr(ə)lyo͞oˈhēdrəl
Geology
  • (of a mineral crystal in a rock) bounded by faces corresponding to its regular crystal form, not constrained by adjacent minerals.

    Example sentencesExamples
    • The remaining 5-10% of zircon grains are rhombic, prismatic or long-prismatic euhedral crystals, and are always transparent and colourless to pale pink.
    • During crystallization of the derivative granite, minor secondary zircon grew around the older cores, resulting in euhedral crystal forms of all the grains.
    • The mineral separates provided a population of euhedral, prismatic crystals, which are either transparent and colourless or chocolate brown and translucent to opaque.
    • Titanite occurs as up to 2 cm long, dark brown, euhedral crystals in textural equilibrium with the other minerals.
    • Some biotite crystals form perfectly euhedral plates, others show a reaction rim rich in opaque granules towards the surrounding microfelsitic base.
 
 

Definition of euhedral in US English:

euhedral

adjectiveyo͞oˈhēdrəl
Geology
  • (of a mineral crystal in a rock) bounded by faces corresponding to its regular crystal form unconstrained by adjacent minerals.

    Example sentencesExamples
    • During crystallization of the derivative granite, minor secondary zircon grew around the older cores, resulting in euhedral crystal forms of all the grains.
    • Some biotite crystals form perfectly euhedral plates, others show a reaction rim rich in opaque granules towards the surrounding microfelsitic base.
    • Titanite occurs as up to 2 cm long, dark brown, euhedral crystals in textural equilibrium with the other minerals.
    • The mineral separates provided a population of euhedral, prismatic crystals, which are either transparent and colourless or chocolate brown and translucent to opaque.
    • The remaining 5-10% of zircon grains are rhombic, prismatic or long-prismatic euhedral crystals, and are always transparent and colourless to pale pink.
 
 
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更新时间:2025/2/26 4:15:13