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Outline
A black-brown powder was synthesized from melamine (C3N6H6) by means of high temperature and high pressure. Based on the analysis of X-ray diffraction patterns, the powder is composed of some un-decomposed raw material, carbon and intermediate phases. The existence of the intermediate phase with long periodicity along one direction is confirmed from transmission electron microscopy observation; Scanning electron microscopy shows many block tissues, in which a few holes exist; The atomic ratio of carbon and nitrogen is determined as 3.27∶1 in the powder from the measurement of Energy Dispersive X-ray Analysis. The high content of C is caused by the existence of carbon decomposed from the raw materials. In addition, the chemical bond states are investigated by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. As a result, the main bond styles in the powder are described as C (sp2) N and C (sp2) —N.
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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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