A high-resolution study of shocked Coconino Sandstone from Meteor Crater, Arizona, was undertaken using transmission electron microscopy to investigate the textural relations of high-pressure phases produced by meteorite impact. In weakly shocked rocks (estimated average pressure, P < 100 kb), quartz in the interiors of grains retains its initial microstructure, but near original grain boundari...

thoritc and, from the results of infra-red absorption spectra, concluded that this material contained (oH) groups; however, Mumpton and Roy (1961) in their experiments found no evidence in support of this substitution. rn the course of an extensive study of granitic pegmatites in yugoslavia, M. Risti6 and s. Pavlovi6 found in a pegmatite from prokuplje area, Serbia, zircon crystals associated w...

Oxygen diffusion in natural and synthetic single-crystal titanite was characterized under both dry and water-present conditions. For the dry experiments, pre-polished titanite samples were packed in O-enriched quartz powder inside Ag–Pd capsules, along with a fayalite–magnetite–quartz (FMQ) buffer assemblagemaintained physically separate by Ag–Pd strips. The sealed Ag–Pd capsules were themselve...

The novel application of a piezoelectric quartz resonator for the detection trapped ions has developed in observation quartz-ions interaction under non-equilibrium conditions, opening new perspectives high-sensitive motional frequency measurements radioactive particles. Energized crystals have (long) constant-decay times order milliseconds, permitting coherent charged particles within short tim...

Needle-shaped rutile inclusions occur in garnet within the quartz-eclogite at Mt. Gongen Sanbagawa belt, central Shikoku. They are approximately 5–25 µm along long axis and typically oriented three directions, each intersecting 120°. This indicates that needle-shaped is a lamella exsolved from garnet. Garnet with needle-rutile restricted to quartz-poor domain of quartz eclogite sample, which co...

Samples of quartz-bearing rocks were heated above the a (trigonal)–b (hexagonal) phase transformation of quartz (625–950 C) to explore changes in preferred orientation patterns. Textures were measured both in situ and ex situ with neutron, synchrotron X-ray and electron backscatter diffraction. The trigonal–hexagonal phase transformation does not change the orientation of cand a-axes, but posit...

Quartz solubility in H2O-CO2 fluids was measured at 800 °C and 10 kbar. Mixed fluids were generated from hydrous oxalic acid, silver oxalate, silver carbonate, and liquid H2O; solubility was determined by weight changes of the quartz crystals. Stringent blank tests and weighing procedures were used to establish the CO2 and H2O contents of experimental fluids. Using experimentally constrained mo...

A cost-effective immunosensor for the detection and isolation of dental pulp stem cells (DPSCs) based on a quartz crystal microbalance (QCM) has been developed. The recognition mechanism relies on anti-CD34 antibodies, DPSC-specific monoclonal antibodies that are anchored on the surface of the quartz crystals. Due to its high specificity, real time detection, and low cost, the proposed technolo...