One of the important applications of M?ssbauer effect in mineralogy is the measurement of cation site occupancy in minerals. The combination of M?ssbauer effect and infrared Spectrum will be a more effective method fo...One of the important applications of M?ssbauer effect in mineralogy is the measurement of cation site occupancy in minerals. The combination of M?ssbauer effect and infrared Spectrum will be a more effective method for Fe and Mg order-disorder measurement of amphibole. Some results of studies on cummingtonite-grunerite by this method展开更多
In the structure of alkali amphiboles, Na<sup>+</sup> ions and small amounts of Ca<sup>2+</sup> occupy the M4 site, Fe<sup>2+</sup>, Mg<sup>2+</sup>, Fe<sup>3+<...In the structure of alkali amphiboles, Na<sup>+</sup> ions and small amounts of Ca<sup>2+</sup> occupy the M4 site, Fe<sup>2+</sup>, Mg<sup>2+</sup>, Fe<sup>3+</sup>, Al<sup>3+</sup> etc. are usually distributed over M1, M2 and M3 positions. According to the data of crystal structure analysis, trivalent cations (Fe<sup>3+</sup>, Al<sup>3+</sup> etc.) prefer to occupy the M2 site, Fe<sup>2+</sup> and Mg<sup>2+</sup> usually occupy M1, M3 and M2 sites.展开更多
In 1976 a new iron silicate named Laihunite was first discovered in the Archaean metamorphic iron deposits in Liaoning Province, China, and has been studied since then by many authors. Another ferrifayalite, occurring...In 1976 a new iron silicate named Laihunite was first discovered in the Archaean metamorphic iron deposits in Liaoning Province, China, and has been studied since then by many authors. Another ferrifayalite, occurring in metamorphic rocks in Hebei Province and differing from Laihunite in chemical composition, was found展开更多
In 1978, a particular metamorphic rock—quartz-almandine eulitite, has been identified by the authors for the first time in the region of the Louzi (娄子) Mountain, Qianan (迁安), eastern Hebei Province. The rock has ...In 1978, a particular metamorphic rock—quartz-almandine eulitite, has been identified by the authors for the first time in the region of the Louzi (娄子) Mountain, Qianan (迁安), eastern Hebei Province. The rock has long been mistaken for eclogite. However, it differs from both eclogite (seneu straito)and eulysite, and garnet pyroxenite. The last one is often found to be associated with ultramafic rocks.展开更多
文摘One of the important applications of M?ssbauer effect in mineralogy is the measurement of cation site occupancy in minerals. The combination of M?ssbauer effect and infrared Spectrum will be a more effective method for Fe and Mg order-disorder measurement of amphibole. Some results of studies on cummingtonite-grunerite by this method
文摘In the structure of alkali amphiboles, Na<sup>+</sup> ions and small amounts of Ca<sup>2+</sup> occupy the M4 site, Fe<sup>2+</sup>, Mg<sup>2+</sup>, Fe<sup>3+</sup>, Al<sup>3+</sup> etc. are usually distributed over M1, M2 and M3 positions. According to the data of crystal structure analysis, trivalent cations (Fe<sup>3+</sup>, Al<sup>3+</sup> etc.) prefer to occupy the M2 site, Fe<sup>2+</sup> and Mg<sup>2+</sup> usually occupy M1, M3 and M2 sites.
文摘In 1976 a new iron silicate named Laihunite was first discovered in the Archaean metamorphic iron deposits in Liaoning Province, China, and has been studied since then by many authors. Another ferrifayalite, occurring in metamorphic rocks in Hebei Province and differing from Laihunite in chemical composition, was found
文摘In 1978, a particular metamorphic rock—quartz-almandine eulitite, has been identified by the authors for the first time in the region of the Louzi (娄子) Mountain, Qianan (迁安), eastern Hebei Province. The rock has long been mistaken for eclogite. However, it differs from both eclogite (seneu straito)and eulysite, and garnet pyroxenite. The last one is often found to be associated with ultramafic rocks.
