Experimental Charge Densities of Semiconducting Cage Structures Containing Alkaline Earth Guest Atoms Work at the X10c beamline at NSLS was supported by the Division of Materials Sciences of the US Department of Energy (DE-AC02-98CH10886). B.B.I. and A.E.C.P. gratefully acknowledge support from the Danish and Swedish Research Councils (SNF, TFR, STINT). This work was partially supported by the Office of Naval Research (G.D.S., J.D.B., S.L., A.E.C.P.), and it made use of MRL Central Facilities supported by the National Science Foundation under Award No. DMR96-32716. Dr. R. L. Paul of NIST is thanked for the Cold Neutron Prompt Gamma Ray Activation Analysis
Angew Chem Int Ed Engl. 2000 Oct 16;39(20):3613-3616.
doi: 10.1002/1521-3773(20001016)39:20<3613::aid-anie3613>3.0.co;2-d.