Re-discovery and re-definition of dinite, C20H36, a forgotten organic mineral from Garfagnana, northern Tuscany, Italy
Franzini, Livia; Pasero, Marco; Perchiazzi, Natale
European Journal of Mineralogy Volume 3 Number 5 (1991), p. 855 - 862
published: Oct 2, 1991
manuscript accepted: Apr 23, 1991
manuscript received: Nov 28, 1990
ArtNo. ESP147050305008, Price: 29.00 €
Abstract The rare organic mineral dinite was found during the last century at Castelnuovo Garfagnana, Tuscany, Italy. After a chemical study, which indicated an erroneous chemical formula C18H16, it was stored in the Mineralogical Museum of the University of Pisa, where it was recently relocated. A new chemical analysis was carried out on dinite, and NMR, IR and mass spectra are presented here. The new data allows a re-definition of dinite as a distinct mineralogical species, with chemical formula C20H36. Single crystal X-ray diffraction work showed dinite to be orthorhombic, space group P212121with a = 12.356, b = 12.762, c = 11.427 Å. Its crystal structure has been refined up to R = 0.068. Dinite is an alicyclic saturated hydrocarbon with three condensed cycles in the formula unit.