As a fundamental property of pressure-induced amorphization (PIA) in ice and ice-like materials (notably α-quartz), the occurrence of mechanical instability can be related to violation of Born criteria for elasticity. The most outstanding elastic feature of α-quartz before PIA has been experimentally reported to be the linear softening of shear modulus C44, which was proposed to trigger the tra...

Optically stiniulated luminescence (OSL). has been studied in synthetic quartz crystals. which had previously been exposed to Jtor X-irradiations. The main emission hands appeared at 380 and -~440 nm. The excitation spectra of these emission bands were now measured and showed both a maximum at 330nm. This maximum coincides with an excitation maximum of the phototransferred thermoluminescence (P...

A flinty, spherulitic dyke of peralkaiine trachyte in a Precambrian dyke-swarm consists mainly of albite and aegirine. Within this, euhedral crystals of narsarsukite, NadTi,Fe)Si401o(F), occur as short prisms elongate parallel to c. This distinguishes them from all previously described narsarsukites, which have tabular habits. Minor phases present include micas, apatite, quartz, pectolite, nord...

The effects of UV (193 nm) laser irradiation of ant imony in the atmosphere on the kinetics of oxidation and on the oxide stoichiometry have been studied using a quartz microbalance and X-ray photoelectron spectroscopy. An absolute calibration of the quartz microbalance enables us to measure quantitatively the kinetics of the oxygen uptake on a thin film; while XPS results indicate the evolutio...

An introduction and survey is given of some recent work on the infinitesimal dynamics of crystal frameworks, that is, of translationally periodic discrete bond-node structures in R, for d = 2, 3, . . . . We discuss the rigidity matrix, a fundamental object from finite bar-joint framework theory, rigidity operators, matrix-function representations and low energy phonons. These phonons in materia...

Introduction: Quartz is one of the most common minerals in rocks on Earth and on other non-icy planetary bodies. Apart from the generation of microstructural features such as planar fractures and planar deformation features, which are associated with the high pressure and loading rates associated with shock loading [1,2], not much is known on the fracture behavior of this material during large ...

Through in situ quartz crystal microbalance (QCM) monitoring, we resolve the growth of a self-assembled monolayer (SAM) and subsequent metal oxide deposition with high resolution. We introduce the fitting of mass deposited during each atomic layer deposition (ALD) cycle to an analytical island-growth model that enables quantification of growth inhibition, nucleation density, and the uninhibited...

Sector-zoned aegirine was found in a specimen of Sanbagawa quartz schist from the Iimori region of the western Kii Peninsula, central Japan. The schist consists of quartz, aegirine, albite, amphibole (magnesioriebeckite to manganocummingtonite), garnet (spessartine), rhodochrosite, pyrophanite, jacobsite, and apatite. Aegirine occurs as subhedral to euhedral prismatic crystals less than 250 μm ...

The capability to measure Q factors at cryogenic temperatures enhances the ability to study relaxation processes in solids. Here we present a high-precision cryogenic setup with the ability to measure Q factors of at least 10(9). This level of sensitivity offers new potential for analyzing relaxation processes in solids and for correlating mode shape and relaxation strength. Our improved method...

The first applications of acoustic devices to chemical detection were proposed by Sauerbray in 1959 [1]. For application in liquid media, mainly quartz microbalance (QCM) sensors have been investigated. Recent works on Love waves devices for gas detection have demonstrated definitely their superiority, in particular in term of mass loading effect sensitivity [2]. As the shear horizontal polariz...