منابع مشابه
Dauphiné twinning in polycrystalline quartz
A recently developed crystal based continuum model for twinning and phase transformations is successfully applied to Dauphiné twinning and the α (trigonal) ↔ β (hexagonal) phase transformation in quartz. Both finite element and uniform deformation simulations are performed of quartz polycrystals and several experimentally observed phenomena are qualitatively reproduced. Results are given for me...
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Following the classification of quartz as a human carcinogen by the IARC, many standard-setting committees are currently trying to convert this hazard into their national or EU standards. Since human data to set a safe exposure limit for quartz are limited, we hypothesized that lung burden data on quartz in coal miners' lungs after lifetime exposure could be used to set a non-carcinogenic lung ...
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A new approach to detecting a weak photoacoustic signal in a gas medium is described. Instead of a gas-filled resonant acoustic cavity, the sound energy is accumulated in a high- Q crystal element. Feasibility experiments utilizing a quartz-watch tuning fork demonstrate a sensitivity of 1.2x10(-7) cm(-1) W/ radicalHz . Potential further developments and applications of this technique are discus...
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sq02_080825_terms_e Synthetic Quartz Crystal: A single crystal grown using the hydrothermal synthesis method. As-Grown Quartz Crystal: A synthetic quartz crystal grown naturally with no processing. Lumbered Quartz Crystal: A synthetic quartz crystal with the X and Z surfaces processed according to specified dimensions and angles using a diamond wheel #80. Y-bar Synthetic Quartz Crystal: A synth...
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Background & Aim: Chaharmahal va Bakhtiari province contains several major floristic plant associations of central Zagros Mountains. Kallar species were used for medicines nutrias in this area. However, these valuable species have been threatened and even become at risk of extinction due to habitat fragmentation and disturbance. Therefore, the first step in protecting theses species is identify...
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ژورنال
عنوان ژورنال: Acta Crystallographica
سال: 1965
ISSN: 0365-110X
DOI: 10.1107/s0365110x65001639