作者:K.R. Poeppelmeier、M.E. Leonowicz、J.M. Longo
DOI:10.1016/0022-4596(82)90404-2
日期:1982.8
NH3) or organic (C2H4, C3H6) reducing agents between 300 and 500°C, topotactic reaction occurs to produce the ordered oxygen-defect phases CaMnO2.5 and Ca2MnO3.5, respectively. Orthorhombic cell constants for CaMnO2.5 are a = 5.43(1), b = 10.24(1), and c = 3.74(1) Å, and for Ca2MnO3.5 are a = 5.30(1), b = 10.05(1), and c = 12.24(1)Å. These compounds were characterized by powder X-ray diffraction, thermogravimetric
我们发现,当前体CaMnO 3和Ca 2 MnO 4被各种无机还原剂(H 2,NH 3)或有机还原剂(C 2 H 4,C 3 H 6)中的任何一种还原时,在300至500°之间C,发生全位反应,分别产生有序的氧缺陷相CaMnO 2.5和Ca 2 MnO 3.5。为CaMnO斜方晶胞常数2.5是一个= 5.43(1),b = 10.24(1),和C ^ = 3.74(1)埃,对于CA 2的MnO3.5是a = 5.30(1),b = 10.05(1)和c = 12.24(1)Å。这些化合物的特征在于粉末X射线衍射,热重分析,磁化率和红外光谱。还原的化合物在低温下在氧气中可逆地氧化为它们各自的前体。