Now showing items 11-17 of 17
Heat capacity and entropy of rutile (TiO 2 ) and nepheline (NaAlSiO 4 )
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2002-05)
From heat capacities measured adiabatically at low temperatures, the standard entropies at 298.15 K of synthetic rutile (TiO 2 ) and nepheline (NaAlSiO 4 ) have been determined to be 50.0 ± 0.1 and 122.8 ± 0.3 J mol −1 ...
The compositional variation of synthetic sodic amphiboles at high and ultra-high pressures
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2000-06)
Sodic amphiboles in high pressure and ultra-high pressure (UHP) metamorphic rocks are complex solid solutions in the system Na 2 O–MgO–Al 2 O 3 –SiO 2 –H 2 O (NMASH) whose compositions vary with pressure and temperature. ...
Relation of Carlin-type gold mineralization to lithology, structure and alteration: Screamer zone, Betze-Post deposit, Nevada
(Springer-Verlag, 2003-01)
An evaluation of the relation between geologic features and gold grade has been undertaken in the Screamer zone of the Betze-Post deposit, the largest Carlin-type gold deposit in the world. Screamer, which forms the western ...
Low-temperature behaviour of ammonium ion in buddingtonite [N(D/H) 4 AlSi 3 O 8 ] from neutron powder diffraction
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2004-12)
The structural response of buddingtonite [N(D/H) 4 AlSi 3 O 8 ] on cooling has been studied by neutron diffraction. Data have been collected from 280 K down to 11 K, and the crystal structure refined using the Rietveld ...
Applications of near-infrared FT-Raman spectroscopy in metamict and annealed zircon: oxidation state of U ions
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2004-09)
We report a near-infrared Fourier-transform (FT) Raman spectroscopic method to characterize the electronic transitions of U ions and the alpha-decay damage in natural zircon. The application is demonstrated by analyzing ...
Thermodynamics and crystal chemistry of the hematite–corundum solid solution and the FeAlO 3 phase
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2002-09)
High-temperature oxide-melt calorimetry and Rietveld refinement of powder X-ray diffraction patterns were used to investigate the energetics and structure of the hematite–corundum solid solution and ternary phase FeAlO 3 ...
Trace-metal content of the Pueblo Viejo precious-metal deposits and their relation to other high-sulfidation epithermal systems
(Springer-Verlag, 2003-09)
We provide here information on the distribution of copper, zinc, lead, gold, silver, barium, arsenic, antimony, mercury, selenium and tellurium in the Moore and Monte Negro high-sulfidation epithermal deposits in the Pueblo ...