Depending on the chemical composition the structural parameters of the melilite vary in the range between gehlenite and mernite.Melilitic separation and melilite as a primary phase are very rare.
黄长的结构参数,按其化学成分是在钙铝黄长
和镁黄长
之间变化,黄长
原始矿物
在碱性矿
较罕见。