Lepidolith

Lepidolith is a term that appears in scattered mineralogical references but is not recognized as a distinct mineral species by major authorities. In many sources, Lepidolith is used as a misnomer or informal synonym for lepidolite, a lithium-rich mica, or described as a hypothetical lithium-bearing mica-like phase. Because it is not an accepted mineral name, there is no official chemical formula, crystal structure, or standardized classification for Lepidolith.

Taxonomy and naming can be inconsistent. The name would be expected to derive from lepid- meaning scaled and lithos meaning stone, following conventions used for other mica-like minerals, but without formal acceptance there is no formal taxonomic placement.

Physical properties commonly attributed in non-peer-reviewed discussions describe Lepidolith as a soft, lithium-rich phyllosilicate in the mica family. Reported colors range from lavender to lilac, with a vitreous to pearly luster and perfect basal cleavage. Mohs hardness is often noted as approximately 2.5 to 3. These properties would be typical of micas, though exact values and appearance are unsettled in the absence of a formal description.

Occurrence and formation are likewise uncertain. If Lepidolith were to exist as a mineral, it would presumably form in late-stage lithium-rich pegmatites or in hydrothermal environments associated with lithium mineralization. However, detailed locality data are not established, and many references point to conflation with lepidolite.

Relation to lepidolite: In practice, Lepidolith is frequently conflated with lepidolite, and identifications are often revised to lepidolite upon closer examination.

See also: Lepidolite, Mica group minerals, Pegmatite, Lithium minerals.