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I_b型人造金刚石在温度为1500—2500℃和压力为6.5—9.5 GPa条件下经过处理,形成了天然金刚石中存在的所有氮的聚集体:A中心,B中心,N3中心和片状体。在红外吸收谱线中出现了与片状体有关的7.3μm吸收峰。I_b型金刚石经过超高压和2000℃以上温度的处理变得特别耐磨。I_aA型天然金刚石经压力为9.5 GPa左右和高达2700℃的处理,其红外吸收谱线中的7.3,7.8,8.5,9.1,9.9μm等吸收峰发生了改变;A中心转变成了B中心,部分A中心分解成了单个状态的氮原子;并形成了N3中心。
The I_b-type synthetic diamond is treated at temperatures of 1500-2500 ° C and pressures of 6.5-9.5 GPa to form all of the nitrogen aggregates present in natural diamond: the A center, the B center, the N3 center and the platelets. The 7.3 μm absorption peak associated with platelet appeared in the infrared absorption spectrum. I_b-type diamonds have been particularly resistant to abrasion by ultra-high pressure and temperatures above 2000 ° C. I_aA type natural diamond by the pressure of about 9.5 GPa and up to 2700 ℃, the infrared absorption line 7.3,7.8,8.5,9.1,9.9μm other absorption peaks have changed; A center into a B center, part of the Center A breaks down into single-state nitrogen atoms and forms the N3 center.