Amakristalu ayimpushana amhlophe, amandla adonsela phansi athile angu-1.532(17 °C) amunca kalula umswakama, futhi akhe ikhekhe, elincibilika emanzini, futhi ukuncibilika kuyahlukahluka njengoba izinga lokushisa likhuphuka, liba ngaphansi kuka-340 °C. Kubonakala sengathi ukubola okuncane.
Lo mkhiqizo unebala elibomvu elingeziwe