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Cesium
Nov5-05, 02:21 PM
We all know about hydrides, but I just read about the existance of species with lithide ions. No lithides have been made, but apparently over "30 alkalides" have been made with 18 of them being natrides.

http://www.iupac.org/publications/pac/1993/pdf/6503x0435.pdf
http://www.uni-mainz.de/FB/Chemie/aac/AC1/download/Altdaten/UWS0304/Inorg.%20Chem.%201982%20(21)%201966-1970.pdf

Natrides, katrides, rubides, cesides!! How the heck is this possible?