Water uptake of quartz investigated by means of ion-beam analysis

Quartz hydration dating

“…This is in agreement with the supposition that the hydration layers are not formed by deposition of dissolved SiO 2 but exist in the original quartz material. This finding complements the result of channeling measurements [11] which showed that the hydration layers possess the lattice structure of quartz and of a measurement using grazing-incidence X-ray reflection which showed that the density of the hydration layer agrees with that of bulk quartz to within 1% [12].…”

“…Recently, this author [15,16] found that the model also explains well the results of high-temperature (>400 (C) hydration studies of quartz [5,9,22,23,29]. He also considered preliminary results from our work [10,11].…”

“…To validate the applicability of this equation for dating purposes, we also examined the hydration layers on several quartz artifacts of known ages, thus gaining diffusivity data for ambient temperatures. Some preliminary results have been reported before [10,11].…”

Mechanisms for incorporation of hydrogen in and on terrestrial planetary surfaces

“…At the surface, the olivine is 2500 ppm H 2 O, with counts decreasing to $120 ppm H 2 O at a depth of 1-2 lm. Similar surface concentrations were reported for OH on quartz crystals (Clark et al, 1978;Dersch and Rauch, 1999), on garnet crystals by Katayama et al (2003), and on sillimanite by Beran et al (1989). These experimental data strongly support the notion that the ratio of surface area to volume sampled by the IR beam has a first-order effect on H 2 O concentration estimates.…”

A Study of Positron Properties in Quartz Crystals and Synthetic Silica Glass

“…Pro ba bl y, b oth conÙgura ti ons are present. H + i s unl i kely [8]. It is seen fro m the S ( E ) curves i n Fi g. 6 tha t the hydro gen do es no t ha ve an e˜ect on the Ps in the bul k as expected.…”