Raman spectroscopic study of mellite--a naturally occurring aluminium benzenehexacarboxylate from lignite--Claystone series of the tertiary age.


Raman spectra have been obtained for crystals of the organic mineral mellite, from three different sites. Mellite occurs in the frame of the Tertiary series including lignite and coaly slates at Artern (Thuringia), Tula (Russia) and Bílina (Northern Bohemia). Mellite, Al(2)C(6)(COO)(6) x 16H(2)O, can be considered as evidence of previous biological activity… (More)