Silica is a compound of silicon and oxygen. Earth's outer crust contains 59% of this material. It has three major rock forms, which are quartz, tridymite, and cristobalite. Silica, commonly known in the form of quartz, is the dioxide form of silicon, SiO2. It is usually used to ...
Quartz, also known as rock crystal, is the crystalline form of SiO2 belonging to the trigonal system. A quartz plate is cut from a crystal in a specified direction to form a plate or rod, provided with electrodes and a fulcrum, and connected in an oscillator circuit. Applying an a.c. ...
Piezoelectric quartz (SiO2) crystals are widely used in industry as oscillators. As a natural mineral, quartz and its relevant silicates are also of interest in geoscience and mineralogy. However, the nucleation and growth of quartz crystals are difficult to control and not fully understood. Here ...
ARTICLE DOI: 10.1038/s42004-018-0049-4 OPEN Nucleation of quartz under ambient conditions Phil Buckley1, Natasha Hargreaves1 & Sharon Cooper1 Quartz nucleation normally requires harsh conditions; for instance, hydrothermal processes at 200–300 °C and 15–100 bar, where the high growth rate ...
1. A method for producing nitrogen-doped quartz glass, said method comprising: providing a SiO2 base product in the form of SiO2 grains or in the form of a porous semifinished product produced from the SiO2 grains; and processing the SiO2 base product into the quartz glass with nitrogen chem...
It obeys a Lagrangian point through a shock wave by evolving equations of motion for the atoms and volume of the computational cell over time. This approach constrains the stress in the shock propagation direction to follow the Rayleigh line, while also ensuring that the system’s energy adhere...
3C). The flotation of a 90?g sample takes =2?h; less time is required if the sample contains less feldspar. After the flotation procedure, the quartz is filtered from the solution by rinsing with HCl (5%), washing with deionized water, and drying at <60?°C. The feldspar fraction is...
The potassium silicate solution was changed to SiO2 sol state via the ion-exchange process and then gel state through heating on a hotplate at 60 °C for 3 h. To investigate the effect of the pulverizing process on the morphology and crystallinity of the quartz powder, two gel samples in ...
Linear discriminant analysis (LDA) canonical plot showing the discrimination of low-level gasoline adulteration using a V-MSA. Three concentrations of each sample were analyzed in triplicate. Adulterated samples are denoted as Ethanol, Methanol, Toluene, and Xylene. Each sample contains 1% v/v adult...