Table 2.

SEM-EDS elemental analysis results for RKKP bulk and film.

Spectrum/element	O	F	Na	Mg	Si	P	K	Ca	La	Ta	Total
RKKP bulk	45.0	5.2	2.7	1.5	18.2	3.7	0.2	19.6	0.8	3.1	100.0
Film	45.6	6.3	4.2	2.4	18.7	3.5	0.2	16.9	0.4	1.8	100.0

All results are in weight%.