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Barremian and Early Aptian ammonites from the Godula Facies of the Silesian Unit in the Outer Western Carpathians,Czech Republic
Outer Western Carpathians Silesian Unit Lower Cretaceous Ammonites
2009/10/20
The Early Cretaceous ammonites from the Hradiště Formation (Wernsdorfer Schichten in original concept) in the Czech part of the Silesian Unit of the Outer (Flysch)Western Carpathians are describe...
Geochemistry and U-Pb detrital zircon ages of metasedimentary rocks of the Lower Unit,Western Tatra Mountains (Slovakia)
Western Carpathians Cadomian and Variscan orogeny Metasedimentary rocks
2009/10/20
Acombined geochemical, isotopic and detrital zircon dating study has been carried out on metasedimentary rocks of the Lower Unit from the Western Tatra Mountains (Slovakia) forming an eastern border o...
The Ophiolitic Molasse Unit of Ikaria Island (Greece)
Olistostrome ophiolite Cretaceous molasse Miocene Ikaria Cyclades Greece
2009/7/8
Ikaria Island can be divided generally into two composite tectonic units, namely the lower and upper. The lower unit comprises paragneiss basement with local orthogneiss bodies that is overlain by a p...
Significance of the Volcanogenic Nilüfer Unit and Related Components of the Triassic Karakaya Complex for Tethyan Subduction/Accretion Processes in NW Turkey
Nilüfer Unit NW Turkey Karakaya Complex subduction/accretion Triassic Tethys
2009/7/8
The Tethyan Karakaya Complex extends east-west across northern Turkey from the Aegean coast to Iran (c. 1100 km), and is interpreted as a Mid-Late Triassic subduction/accretion complex. It comprises s...
Alpine Metamorphism and Granitoid Magmatism in the Strandja Zone: New Data from the Sakar Unit, SE Bulgaria
Strandja zone Sakar unit Alpine tectonics syntectonic granitoids structural geology
2009/7/7
The Strandja Zone is a pre-Cenomanian orogen consisting of three tectonic units: the Veleka, Strandja and Sakar units. The first two units display very low-grade Alpine metamorphism, whereas in the S...
Rigid unit modes in crystal structures with octahedrally coordinated atoms
Rigid crystal structures octahedrally coordinated atoms
2012/3/31
The rigid unit mode analysis was initially developed to understand the phase transitions in aluminosilicate minerals containing corner-linked tetrahedra. Here the model is applied to a range of minera...
Synthesis methods and unit-cell volume of end-member titanite (CaTiOSiO4)
Synthesis methods unit-cell volume end-member titanite CaTiOSiO4
2012/4/5
Unit-cellparametersofsynthetic,end-membertitanite(CaTiOSiO )criticallydependonthesynthesisconditions,asisshownforstudiesreportedintheliteratureandfornew
samplesreportedhere.Ourstudysuggeststhatphase-...
Rigid-unit phonon modes and structural phase transitions in framework silicates
Rigid-unit phonon modes phase transitions framework silicates
2012/4/6
Therigid-unit modemodelprovides manynewinsights into the stability and physical properties offramework silicates. In this modelthe Si04and Al04tetrahedra aretreated asverystiff,to a first approximatio...
Short-range disorder of Si and Ti in the tetrahedral double-chain unit of synthetic Ti-bearing potassium-richterite
Short-range disorder Si Ti double-chain unit of synthetic Ti-bearing potassium-richterite
2012/4/5
Ti-rich potassium-richterite samples weresynthesized at 900°C and 1kbar PH20and characterized by Fourier-transform infrared spectroscopy (FTIR) and Rietveld structure refinement. The infrared spectrum...
Dehydroxylation of Aluminous Goethite: Unit Cell Dimensions, Crystal Size and Surface Area
Al-substitution Crystal size Dehydroxylation Goethite Hematite Specific surface area Unit cell
2011/12/27
This work investigates unit cell dimensions, crystal size and specific surface area of aluminous goethite that was progressively dehydroxylated to form hematite. Goethite synthesized from the ferrous ...
Origin and Clay-Mineral Genesis of the Cretaceous/Tertiary Boundary Unit, Western Interior of North America
Claystone Ejecta Glass alteration Halloysite Kaolinite K/T boundary unit Meteorite impact SEM XRD
2011/12/1
Abstract: A 3-cm-thick, two-layered clay unit that records mineralogic and textural evidence of a catastrophic event that occurred at a time now marked as the end of the Cretaceous Period was preserve...
Size Distribution of Allophane Unit Particles in Aqueous Suspensions
Allophane High-resolution transmission electron microscopy Morphology Particle size Small-angle neutron scattering Surface area
2012/2/2
The size distribution of unit particles of two New Zealand allophanes (An and Rh), in dilute (0.8% w/v) aqueous suspensions, has been determined by small-angle neutron scattering (SANS). In addition, ...
The Influence of Aluminum on Iron Oxides. VIII. Unit-Cell Dimensions of Al-Substituted Goethites and Estimation of Al From Them
Aluminum Goethite Iron Unit-cell dimensions X-ray powder diffraction
2011/11/25
Abstract: The unit-cell dimensions of synthetic, Al-substituted goethites showed that the c dimension is a linear function of Al substitution in the range 0?3 mole % Al, but that the a dimension is va...