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Noun1.Zinnwaldite - a mica containing iron and lithiumzinnwaldite - a mica containing iron and lithium  
atomic number 3, Li, lithium - a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
isinglass, mica - any of various minerals consisting of hydrous silicates of aluminum or potassium etc. that crystallize in forms that allow perfect cleavage into very thin leaves; used as dielectrics because of their resistance to electricity
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References in periodicals archive ?
Lepidico owns the technology to a metallurgical process that has successfully produced lithium carbonate from non-conventional sources, specifically lithium-rich mica minerals including lepidolite and zinnwaldite. The L-Max Process has the potential to complement the lithium market by adding low-cost lithium carbonate supply from alternative sources.
"Since demonstrating battery grade lithium hydroxide can be produced from zinnwaldite mineralisation we have worked with Hatch to update the flowsheet and engineering required to adapt our lithium carbonate producing flowsheet to one that converts battery grade lithium carbonate into lithium hydroxide."
Indeed, these Li-micas display complex internal zoning with compositions ranging from Li-muscovite core to zinnwaldite rim and external lepidolite overgrowth, the latter being interpreted as resulting from the early magmatic-hydrothermal transition [60].
Conceived by John Gallin, director of NIH's Clinical Center, and Smithsonian geologists Jeff Post and Mike Wise, the exhibit features 39 minerals, from azurite to zinnwaldite. The specimens not only are beautiful to behold, but all have played an important role in some aspect of human medicine.
Zinnwaldite occurs in the Volodarsk pegmatites, and although it is rarely of specimen quality it is a major constituent of the micas in the pegmatite.
Petrological and geochemical characteristics of the Pleasant Ridge zinnwaldite topaz granite, southern New Brunswick, and comparisons with other topaz-bearing felsic rocks.
Other minerals containing significant F concentrations are topaz, lepidolite, zinnwaldite, and the mica group (Robinson and Edgington 1946).
Certain hard rock lithium projects are understood to contain multiple lithium-bearing minerals (petalite, lepidolite, zinnwaldite, etc.