They coexist with rare-metal element-bearing minerals, such as spodumene, tantalite, beryl, thorite, and sicklerite
((Li, Mn)(P[O.sub.4])), amongst others, and volatile-bearing minerals, such as tourmaline and fluorite .
Secondary phosphates found in the Stewart pegmatite include hureaulite, sicklerite, purpurite, heterosite, stewartite, and phosphosiderite.
Phosphate minerals include primary lithiophilite, triphylite, and amblygonite, and numerous alteration products including hureaulite, purpurite, and sicklerite. Bismuthcontaining minerals found include native bismuth, bismite, bismutite, bismuthinite, and beyerite (Jahns and Wright, 1951).