Variety of Iridescent Plagioclase
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摘要: 斜长石是钠长石 -钙长石的连续固溶体系列, 但在晶体结构上并不连续, 可以划分成几种结构和连生不同的长石区。在晕长石连生区产生晕彩的斜长石为钠奥长石, 在沃基尔德连生区产生晕彩的斜长石为中拉长石。晕彩钠长石和晕彩拉长石都属斜长石系列, 但却是两个不同的宝石品种。根据晕彩拉长石的包裹体和透明度的不同将其进一步分为 3类。Abstract: Plagioclase is a continuous solid solution series of albite-anorthite, but its crystal structure is in continuous, which can be divided into several feldspar areas with different structure and attachment. Iridescent plagioclase in Peristerite area is albite-oligoclase; Iridescent plagioclase in B gild area is andesine-labradorite. Albite and labradorite both belong to plagioclase series, but they are the two different varieties. According to the characters of inclusion and transparency, iridescent labradorite is further divided into three varieties.
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Keywords:
- attachment /
- iridescent plagioclase /
- inclusion /
- infrared spectrum
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