On the Preparation of Some Group I-VI Semiconducting Compounds

A new method for the preparation of cuprous and silver sulphide, selenide and telluride is described. The method provides a stage of purification of the nonmetallic component, which is in most cases a carrier of uncontrolled impurities. The variation of composition by preferential evaporation in vaccum is described and two methods for measurement of stoichiometry are given: measurement by weighing and measurement by electrical conductivity, if the relation composition vs. conductivity is known. Single crystals can be easily obtained only in the case of cuprous sulphide and selenide

On the Preparation of Some Group I-VI Semiconducting Compounds

A new method for the preparation of cuprous and silver sulphide, selenide and telluride is described. The method provides a stage of purification of the nonmetallic component, which is in most cases a carrier of uncontrolled impurities. The variation of composition by preferential evaporation in vaccum is described and two methods for measurement of stoichiometry are given: measurement by weighing and measurement by electrical conductivity, if the relation composition vs. conductivity is known. Single crystals can be easily obtained only in the case of cuprous sulphide and selenide

Rekonstrukcija paleookolja Tr \u17ea\u161kega zaliva v holocenu z uporabo geokemijskih metod -Reconstruction of the Holocene palaeoenvironmentof the Gulf of Trieste by using geochemical methods

The reconstruction of the Holocene paleoenvironment was performed in the Gulf of Trieste by geochemical analysis of four boreholes (V-3, MK -6, V-5 in V-6) from the offshore region and three cores dated with 14C (GT 1, GT 2 in GT 3) taken in the North and central part of the gulf. During the W\ufcrm regression the present Northern Adriatic continental shelf together with the Gulf of Trieste was a wide fluvio-lacustrine plain, where rivers coexisted with swamps and bogs forming peat soils. The cross-section of the Holocene sediment in MK -6 at a depth of 48 m below the present sea level indicates that the early Holocene \u2013 late Glacial sediment occurred about 10,000-11,000 years BP, when the sea started to enter the Ri\u17eana valley. At that time the eastern part of the Bay of Koper was still covered by the Ri\u17eana fluvial deposits. Marine sedimentation prevailed over brackish sedimentation during the most intensive marine transgression at the depth of 26 m in all four boreholes. The marine sediment is present at the depth of 1.6 m, 2.1 and 1.0 m in GT 1, GT 2 and GT 3 cores in the central part of the Gulf of Trieste, respectively indicating the lower rate of sedimentation compared to offshore regions. In the lower part of these sediments the fluvial-brackish sediment prevails, dated to 9030 \ub1 70 BP in GT 1, 9380 \ub1 40 BP in GT 2 and 9160 \ub1 50 BP in GT 3. These data are in good agreement with the general sea-level rise in the northern Adriatic in the Holocen

The Dolenja vas section, a transition from Cretaceous to Paleocene in the NW Dinarides, Yugoslavia

The Dolenija vas succession encompassing the Cretaceous-Tertiary boundary is described. Main fossil markers are figured

Stop 1: the Dolenja Vas section (Upper Maastrichtian, Lower and Upper Danian, Thanetian)

The Upper Cretaceous-Plaeocene series of Dolenja vas is descripte