Iikristale ezinomgubo omhlophe, ubunzima obuthile obuyi-1.532(17 °C) bufunxa ngokulula ukufuma, kwaye yenze ikeyiki, enyibilikayo emanzini, kwaye ukunyibilika kuyahluka njengoko ubushushu bunyuka, buthoba kwi-340 °C. Kubonakala ngathi ukubola okuncinci.
Le mveliso inebala elibomvu elongeziweyo