Orientation and effects of channel H 2 O and CO 2 in cordierite
Orientation and effects of channel H 2 O and CO 2 in cordierite
复制标题
堇青石中H 2 O和CO 2 通道的取向和影响
作者：
T. Armbruster;F. Bloss
将通道CO2和H2O重新引入到来自澳大利亚白色Well的通道抽空的Mg-堇青石Ko.或Nao.o：（Mg 1.e1Fe 6.6eMn0或）All e6 Si 5.s1O 16中。在600 ℃和高达6千巴的压力下，最大3.13重量%的Vo CO2和2.6重量%的水重新进入堇青石的通道。H_2O分子优先取向，其H-H矢量平行于c（光学取向：c = X，B：Y，a：Z），随着H_2O含量的增加，折射率y和B的增加比a的增加更强烈，而随着晶胞边缘的减小，b_0可能略有增加，cs先增加后趋于平稳。线性CO2分子的取向主要平行于堇青石的a轴，因此，随着CO2含量的增加，折射率T的增加比a和B更强烈。结果，2 V1随着CO2含量增加而增加，从而超过90”。同时，c6增加，减少，并保持不变。这些晶体的畸变指数A随H_2O和CO_2含量的变化而变化。
Channel CO2 and H2O has been re-introduced into a channel evacuated Mg-cordierite Ko.or Nao.o:(Mg1.e1Fe6.6eMno or)All e6Si5.s1O16 from White Well, Australia. At 600'C and pressures up to 6 kbar, a maximum of 3.13 wt.Vo CO2 and 2.6 wt.% H2O re-enter cordierite's channels. The H2O molecule orients preferentiallywithits H-H vectorparallelto c (opticorientation: c = X,b: Y,a: Z).Wirh increased H2O content, the refractive indices y and B increase more strongly than a whereas the as cell edge decreases, b0 perhaps increases slightly, and cs first increases and then levels off. The linear CO2 molecule orients chiefly parallel to cordierite's a-axis so that, as CO2 content increased, refractive index Tincreased more strongly than did aand B. As a result, 2V^ increased with CO2 content so as to exceed 90". Simultaneously, c6 increased, as decreased, and be remained constant. The distortion index A for these crystals changed with H2O and COz content.