Secondary mineral formed in the oxidized zone of a U-As deposit.
Valid Species (Pre-IMA) 1958
Dump of the Sophia mine, near Wittichen, Black Forest, Germany. Link to MinDat.org Location Data.
Named for meta which indicates membership of this species in the meta-autunite group and for Franz Waldemar Kirchheimer (1911-), former Director of the Geological Survey of Baden-Wu rttemberg, Germany.