Fu Pei-Ge, Zheng Hai-Fei
Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, Peking University, Beijing 100871, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Jan;31(1):127-30.
Raman spectra of aragonite were studied at ambient temperature and pressure of 0.1 - 2 GPa in a moissanite anvil cell using Raman spectrum technique. The relations between the Raman shifts of aragonite and the system pressure are given as follows: v153 (cm(-1)) = 0.003 5p (MPa) +154.0, v206 = 0.006 0p + 206.3, v704 = 0.002 1p + 704.2, v1085 = 0.003 5p + 1 085.3. No phase transition occurred in aragonite within the range of experimental pressure. Similar to other carbonate minerals (magnesite, dolomite), the measured relative pressure-shift of the Raman line of the symmetric stretching vibration of aragonite is greater at 0.1-2 GPa than at ultrahigh pressure, which indicates that the C-O bond compressibility of the CO3 groups is related to the pressure, and it is more compressible at 0.1 - 2 GPa than at higher pressure.
在莫氏石砧座单元中，利用拉曼光谱技术，在室温及0.1 - 2吉帕的压力下对文石的拉曼光谱进行了研究。文石的拉曼位移与系统压力之间的关系如下：v153（厘米⁻¹）= 0.003 5p（兆帕）+ 154.0，v206 = 0.006 0p + 206.3，v704 = 0.002 1p + 704.2，v1085 = 0.003 5p + 1085.3。在实验压力范围内，文石未发生相变。与其他碳酸盐矿物（菱镁矿、白云石）类似，在0.1 - 2吉帕时，文石对称伸缩振动拉曼线的实测相对压力位移比在超高压时更大，这表明CO₃基团的C - O键压缩性与压力有关，且在0.1 - 2吉帕时比在更高压力下更易压缩。
