hellandite

The monoclinic space group of synchysite-(Y) was determined as C2/c by single一crystal crystallographic research using Weissenberg method.

新奇钙钇矿［ｓｙｎｃｈｙｓｉｔｅ－（Ｙ）］，ＹＣａ（ＣＯ＿ｓ）Ｆ，经单晶Ｘ射线魏森堡法研究表明属单斜晶系，空间群为Ｃ２／ｃ，由四圆衍射仪精化求得的晶胞参数为：ａ＝１２。