A discussion group on the calculation of petrologic phase equilibria was started at groups.yahoo.com/groups/Perple_X on Feb 12, 2009. With regard to Perple_X, this group provides a forum to compensate for its abysmal documentation. More importantly, the group serves as a venue for the exchange of information on subjects where I have little expertise, e.g.: on the choice of solution models and thermodynamic data bases; on the optimal choice of run time options; and on ways to use the programs efficiently.
†b. February 12, 2009; d. June 14, 2009; RIP.