单词 hielmite 释义 hielmite Min.|hjlmat|[Named 1860 (Hjelmit), after the Swedish chemist P. J. Hjelm (1746–1813).]A black stanno-tantalate of iron and other bases, found as a massive mineral.1861Amer. Jrnl. Sc. Ser. iii. XXXI. 362 Hjelmite..a new tantal...