a kind of natural glass produced when molten lava cools very rapidly
Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling magma. Like all types of glass, it is a state of matter intermediate between the close-packed, highly ordered array of a crystal and the highly disordered array of gas.
例句与用法
1.
Piece of black , volcanic glass 一块黑色的火山玻璃。
2.
A usually black or banded , hard volcanic glass that displays shiny , curved surfaces when fractured and is formed by rapid cooling of lava 黑曜岩火山玻璃，一般为黑色，带状，摔碎时色泽光亮，表面变曲，由火山熔岩迅速凝而成
3.
Placer abnormal of volcanic lithoclast at longjingjie in kaili of guizhou locates in regional shidongkou deep and major fault nearby , abnormal materials that are obsidian lithoclast and volcanic glass 贵州凯里龙井街火山岩屑重砂异常位于区域性施洞口深大断裂近旁，异常物质为黑曜岩屑及火山玻璃。
4.
Perlite is lava of acid volcanic glass ; there is certain combo water in it . can be swselled in high temperature , it is a main ore source to make adiabatic materials with high quality and super light 珍珠岩是酸性火山玻璃质熔岩，其中含有一定量的结合水，在高温下迅速膨胀，是制作优质超轻绝热材料的主要矿石资源。
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