It is found in tin-bearing, hydrothermal vein deposits occurring with chalcopyrite, sphalerite, tetrahedrite, arsenopyrite, pyrite, cassiterite, and wolframite.
en.wikipedia.org It occurs associated with cassiterite, arsenopyrite, molybdenite, tourmaline, topaz, rhodochrosite and fluorite.
en.wikipedia.org Furthermore, it was noted by the company that the concentrate had no deleterious elements (including radioactive ones) and that very clean tantalite and cassiterite can be extracted.
www.proactiveinvestors.com.au It occurs associated with stibnite, sphalerite, baryte, fluorite, siderite, cassiterite, arsenopyrite, stannite, zinkenite, tetrahedrite, pyrite, alunite, quartz, pyrargyrite, stephanite and rhodochrosite.
en.wikipedia.org The pegmatites are comprised of albite, quartz, muscovite and spessartine garnet, with the mineralised zones hosting lepidolite, spodumene, tantalite and cassiterite, and small amounts of microlite, tapiolite and beryl.
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