Name: Quartz RRUFF ID: R100134 Ideal Chemistry: SiO 2 Locality: Sri Lanka Source: William W. Pinch Owner: RRUFF Description: Transparent colorless cut gemstone Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction. Mineral Group: [ Quartz (11)]

The X-ray diffraction (XRD) spectrum of the sample is shown in Figure 1. The chemical element analysis results indicated that the content of SiO2 in the quartz samples was as high as 97.63%,...

For comprehensive utilization of powder quartz, a detailed mineralogical analysis is needed. In this paper, the minerals collected from a powder quartz deposit in Yunnan Province and its...

2013年12月1日 · This paper presents data for twelve common concrete aggregate materials of sedimentary origin from Italy. Powdered materials have been assessed by XRD for calculation of quartz crystallinity index values (QCI), and for microstructural analysis using full …

2021年9月1日 · The X-ray diffraction (XRD, X'Pert3 Powder, PANalytical, Cu Kα radiation) pattern of quartz is presented in Fig. 1. The main phase of the natural vein quartz was found to be α-quartz, and no other impurity phases were detected by …

2005年1月13日 · Taking the certified reference value for SRM 1878 as 95.5 ± 1.1% crystalline quartz, the HSE standard A9950 (Sikron F600) contains 96.3 ± 1.4% crystalline quartz based on a comparison of peak area intensities. On the same basis but using peak height intensities, the nominal crystalline quartz content of A9950 (Sikron F600) is 101.2 ± 1.8%.

The quartz samples were first reduced to 212×150 µm particle size by a close circuit automatic agate mortar. The XRD analysis of the sample indicated that only quartz mineral was the main ...

The aims of the present study were to assess the effect of the quartz particle size on XRD quantifications, and use it to develop models for correcting the measured quartz concentrations of samples collected from the field.

The number of reflections increases from fluorite to quartz to fayalite, and the patterns for fluorite and quartz appear to have a more even spacing of peaks. An experienced crystallographer can often tell the crystal system with one look at a diffraction pattern, even if …

2020年8月26日 · Plate-impact loading provides a uniform, well-defined state of uniaxial strain within the shocked quartz. The XRD data provide a complete picture of the material response by revealing new details of the crystal structure for stresses from 31 to 65 GPa.