Avoidance of 2 Al atoms in a 5-Ring A New Rule Complementing the Loewenstein's Rule

摘要

A new rule is proposed which restricts the distribution of Al atoms in zeolitic frameworks complementing the Loewenstein's rule. The new rule shows that any 5-ring in a siliceous zeolitic framework can not contain two Al atoms, and is applied to determine the lowest limit of Si/Al ratio in these zeolites.