Caesium fluoride
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Walkerma" title="User:Walkerma">Walkerma</a> assumed (based on copyright claims).
2 April 2005 (original upload date)
Picture taken ca. January 2005 by <a href="//commons.wikimedia.org/wiki/User:Walkerma" title="User:Walkerma">User:Walkerma</a>