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Detalles de la revista
Formato
Revista
eISSN
1899-8526
Publicado por primera vez
05 Feb 2007
Periodo de publicación
1 tiempo por año
Idiomas
Inglés

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Volumen 50 (2019): Edición 1-4 (December 2019)

Detalles de la revista
Formato
Revista
eISSN
1899-8526
Publicado por primera vez
05 Feb 2007
Periodo de publicación
1 tiempo por año
Idiomas
Inglés

Buscar

3 Artículos
Acceso abierto

Synthesis and characterization of cadmium chlorapatite Cd5(PO4)3Cl

Publicado en línea: 03 Apr 2020
Páginas: 3 - 12

Resumen

Abstract

One of the most effective methods for the immobilization of toxic metals involves the use of minerals from the apatite supergroup. The formation of cadmium chlorapatite may lead to successful entrapping of cadmium; thus, it is important to examine the solubility constant to determine the stability of cadmium in the the apatite structure. Cadmium chlorapatite was synthetized and characterized by X-ray diffraction, infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy. The solubility constant (log) Ksp of cadmium chlorapatite was -65.58. The Gibbs free energy of formation of cadmium chlorapatite reached -3950.48 kJ mol−1. The solubility constant turned out to be low but was enough for cadmium chlorapatiteto be considered a very stable compound..

Palabras clave

  • Apatite
  • Cadmium
  • Cadmium chloroapatite
  • Dissolution
  • Solubility constant
Acceso abierto

Lamprophyric rock locations in Greece

Publicado en línea: 03 Apr 2020
Páginas: 13 - 33

Resumen

Abstract

Twenty-four areas with lamprophyric formations have been located through a bibliographic search in Macedonia, Thrace, the islands and Attica. Most lamprophyre types have been identified including rare “alkali minette”. In most localities the dikes/sills appear to be late mantle products associated with deep faulting following extensional activity in granitoids.

Palabras clave

  • lamprophyric rocks
  • distribution
  • Greece
  • bibliography
Acceso abierto

Geochemistry, mineral chemistry and P-T evaluation of metasediments of Bahram-Gur complex, ES Sanandaj-Sirjan zone, Iran

Publicado en línea: 03 Apr 2020
Páginas: 34 - 68

Resumen

Abstract

The Bahram-Gur area in the southeastern part of the Sanandaj – Sirjan metamorphic zone, contains metabasites and metasediments. The metasedimentary rocks are mainly garnet schists and garnet-staurolite schists that were metamorphosed under amphibolite facies conditions. The rocks consist of garnet ± staurolite, biotite, muscovite, chlorite and quartz. The geochemistry of the Bahram-Gur metasediments classifies them as quartziferous sedimentary rocks. The protoliths of the metasedimentary rocks were close to greywackes from an ensialic arc basin depositional setting, with a source comprising mostly mixture of acid and intermediate magmatic rocks in the upper continental crust. The metamorphic conditions of formation of the Bahram-Gur metasedimentary are investigated by geothermobarometric methods. The results show that the metasedimentary rocks formed at temperatures of 600-750°C and pressures of 5-7.5 kbar.

Palabras clave

  • Bahram-Gur area
  • Sanandaj-Sirjan Zone
  • metamorphic conditions
  • metasediments
  • geothermobarometry
3 Artículos
Acceso abierto

Synthesis and characterization of cadmium chlorapatite Cd5(PO4)3Cl

Publicado en línea: 03 Apr 2020
Páginas: 3 - 12

Resumen

Abstract

One of the most effective methods for the immobilization of toxic metals involves the use of minerals from the apatite supergroup. The formation of cadmium chlorapatite may lead to successful entrapping of cadmium; thus, it is important to examine the solubility constant to determine the stability of cadmium in the the apatite structure. Cadmium chlorapatite was synthetized and characterized by X-ray diffraction, infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy. The solubility constant (log) Ksp of cadmium chlorapatite was -65.58. The Gibbs free energy of formation of cadmium chlorapatite reached -3950.48 kJ mol−1. The solubility constant turned out to be low but was enough for cadmium chlorapatiteto be considered a very stable compound..

Palabras clave

  • Apatite
  • Cadmium
  • Cadmium chloroapatite
  • Dissolution
  • Solubility constant
Acceso abierto

Lamprophyric rock locations in Greece

Publicado en línea: 03 Apr 2020
Páginas: 13 - 33

Resumen

Abstract

Twenty-four areas with lamprophyric formations have been located through a bibliographic search in Macedonia, Thrace, the islands and Attica. Most lamprophyre types have been identified including rare “alkali minette”. In most localities the dikes/sills appear to be late mantle products associated with deep faulting following extensional activity in granitoids.

Palabras clave

  • lamprophyric rocks
  • distribution
  • Greece
  • bibliography
Acceso abierto

Geochemistry, mineral chemistry and P-T evaluation of metasediments of Bahram-Gur complex, ES Sanandaj-Sirjan zone, Iran

Publicado en línea: 03 Apr 2020
Páginas: 34 - 68

Resumen

Abstract

The Bahram-Gur area in the southeastern part of the Sanandaj – Sirjan metamorphic zone, contains metabasites and metasediments. The metasedimentary rocks are mainly garnet schists and garnet-staurolite schists that were metamorphosed under amphibolite facies conditions. The rocks consist of garnet ± staurolite, biotite, muscovite, chlorite and quartz. The geochemistry of the Bahram-Gur metasediments classifies them as quartziferous sedimentary rocks. The protoliths of the metasedimentary rocks were close to greywackes from an ensialic arc basin depositional setting, with a source comprising mostly mixture of acid and intermediate magmatic rocks in the upper continental crust. The metamorphic conditions of formation of the Bahram-Gur metasedimentary are investigated by geothermobarometric methods. The results show that the metasedimentary rocks formed at temperatures of 600-750°C and pressures of 5-7.5 kbar.

Palabras clave

  • Bahram-Gur area
  • Sanandaj-Sirjan Zone
  • metamorphic conditions
  • metasediments
  • geothermobarometry

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