Up to three coexisting lepidolites(1M) in hydrothermally synthetic polylithionite-(K)ephesite series micas: an X-ray powder Rietveld refinement

Abstract

X-ray diffraction Rietveld structure-refinement data for synthetic lepidolite-1M micas in the polylithionite (abbreviated here as Pol) – trilithionite (Tri) – potassium ephesite (K-Eph) join, K(Li_2-xAl_1+x)(Si_4-2xAl_2x)O₁₀(OH/OD,F)₂ (x = 0.0–1.0), are reported. In the products synthesized with starting materials of the F2Pol₁₀₀Eph₀₀ (fluoro-Pol) and (OD/OH)Pol₀Eph₁₀₀ (hydroxyl-K-Eph) end members mixtures, up to three coexisting micas are crystallized involving the multisite substitutions, i. e., ^[6]Li_-1^[4]Si_-1^[6]Al^[4]Al and F^-_-1(OH/OD)^-.