The data obtained from field and geothermometric studies and also the REE composition of fluorites associated with lead mineralization at the Kamar-Mehdi mine are compatible with a structurally controlled, fissure filling, epigenetic, hydrothermal origin. Homogenization and last ice melting temperatures for primary fluid inclusions trapped in fluorite crystals indicate that the mineralizati...

studied in previous papers(1)~(4). In the composition range of the single phase near the stoichiometric composition, the former three compounds have been found to have nearly similar magnetic properties to those of Heusler alloys(5). However, many points remain unclear for the compound PtMnSn which is only known to be a fluorite-type ferromagnetic substance. The purpose of this paper is to pres...

We demonstrate optical frequency combs using the fluorite whispering gallery mode resonator as a nonlinear Kerr medium. Two regimes of generation are observed, giving the record low repetition rate of 13 GHz, equal to the cavity's free spectral range (FSR) or high repetition rates of multiples of cavity FSR. An intermediate regime was also observed. Raman lasing spectrum similar to modulation i...