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The high-pressure structure and isothermal equation of state of NiO were investigated up to 67 GPa by in situ synchrotron X-ray diffraction in a diamond anvil cell using argon as the pressure medium. No phase transition was found in this pressure range, nor the the pressure coefficient of axial ratio c/a became larger suddenly at about 60 GPa which was predicted by T. Sasaki. Our experiments showed that the distortion of the structure under pressure was slacker than previous results. We fit the data points to the three-order Brich-Murnaghan EOS, which resulted in a bulk modulus of B0=195 (4) GPa with its pressure derivative B0′=5.3 (2).
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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