Results 121 to 130 of about 2,528 (185)
Some of the next articles are maybe not open access.
The photoelectrochemistry of galena
International Journal of Mineral Processing, 1994Abstract The photoresponse of galena to chopped illumination has been studied to elucidate the surface oxidation of this mineral relevant to flotation. The results substantiated previous findings that sulfur remains in the mineral lattice during the initial stages of oxidation.
P.E. Richardson +3 more
openaire +1 more source
Bismuthoan galena—A new variety of galena
Chinese Journal of Geochemistry, 1990Bismuthoan galena is a variety of galena, resulting from the replacement of Bi for some Pb in galena. This mineral occurs in the No. 11 orebody of the Lamo skarn-type Zn−Cu deposit in the Dachang ore field, but only in the No. 11 orebody of the Lamo deposit is developed such bismuthoan galena.
openaire +1 more source
Journal of Mining Science, 2012
The authors study the process of the oxidation of galena in the liquid phase of flotation pulp of alkaline pH in terms of the formal kinetics. Kinetic schemes of the process are considered. The theoretical kinetic parameters of the overall oxidation reactions of galena are defined as a result of calculations. The most probable rate-determining steps of
B. E. Goryachev, A. A. Nikolaev
openaire +1 more source
The authors study the process of the oxidation of galena in the liquid phase of flotation pulp of alkaline pH in terms of the formal kinetics. Kinetic schemes of the process are considered. The theoretical kinetic parameters of the overall oxidation reactions of galena are defined as a result of calculations. The most probable rate-determining steps of
B. E. Goryachev, A. A. Nikolaev
openaire +1 more source
The Journal of Geology, 1938
The cave systems commonly are reticulated patterns, faithful delineations of the joint system of the formation, with no integration toward a trellised subterranean drainage pattern. The distribution of the lead and zinc ores gives no indication of any former lower water table.
openaire +1 more source
The cave systems commonly are reticulated patterns, faithful delineations of the joint system of the formation, with no integration toward a trellised subterranean drainage pattern. The distribution of the lead and zinc ores gives no indication of any former lower water table.
openaire +1 more source
Nature, 1951
RECENTLY, Ramachandran and Wooster1 have obtained the elastic constants of galena, among other substances, from measurements on diffuse reflexion of X-rays, and reported disagreement with the values given earlier by one of us2. Ramachandran has also directed our attention to this in private communications.
S. BHAGAVANTAM, T. SESHAGIRI RAO
openaire +1 more source
RECENTLY, Ramachandran and Wooster1 have obtained the elastic constants of galena, among other substances, from measurements on diffuse reflexion of X-rays, and reported disagreement with the values given earlier by one of us2. Ramachandran has also directed our attention to this in private communications.
S. BHAGAVANTAM, T. SESHAGIRI RAO
openaire +1 more source
Journal of Crystal Growth, 1970
Abstract Natural galena whiskers have been observed in the hydrothermal polymetal deposit of “Mogilata”, Madan ore district, Bulgaria. Using optical goniometric and X-ray techniques there have been determined [100] and [110] whiskers, as well as different kinked whiskers connected with the change of the growth direction.
openaire +1 more source
Abstract Natural galena whiskers have been observed in the hydrothermal polymetal deposit of “Mogilata”, Madan ore district, Bulgaria. Using optical goniometric and X-ray techniques there have been determined [100] and [110] whiskers, as well as different kinked whiskers connected with the change of the growth direction.
openaire +1 more source
2016
Treball final de Grau en Enginyeria en Disseny Industrial i Desenvolupament de Productes. Codi: DI1048.
openaire +1 more source
Treball final de Grau en Enginyeria en Disseny Industrial i Desenvolupament de Productes. Codi: DI1048.
openaire +1 more source
IEEE Aerospace and Electronic Systems Magazine, 1988
The author reminisces about the early days of radio. He describes the first radio sets and his entry into commercial radio in the 1920s. He discusses his work at GE, RCA, and Brunswich Balke Collender during the 1920s and military research he as involved in during the 1930s. >
openaire +1 more source
The author reminisces about the early days of radio. He describes the first radio sets and his entry into commercial radio in the 1920s. He discusses his work at GE, RCA, and Brunswich Balke Collender during the 1920s and military research he as involved in during the 1930s. >
openaire +1 more source