Alpha quartz can look like scepters, rounded pebbles, or clusters of needles.
Α-石英可以看起来像权杖、圆鹅卵石，或是成簇的针状物。
| 单词 | Alpha quartz |
| 释义 |
Alpha quartz
原声例句
Scishow 精选系列 Alpha quartz can look like scepters, rounded pebbles, or clusters of needles. Α-石英可以看起来像权杖、圆鹅卵石，或是成簇的针状物。
英语百科
Quartz inversionThe room-temperature form of quartz, α-quartz, undergoes a reversible change in crystal structure at 573 °C to form β-quartz. This phenomenon is called an inversion, and for the α to β quartz inversion is accompanied by a linear expansion of 0.45%. This inversion can lead to cracking of ceramic ware if cooling occurs too quickly through the inversion temperature. This is called dunting, and the resultant faults as dunts. To avoid such thermal shock faults, cooling rates not exceeding 50 °C/hour have been recommended. |
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