The crystal structure of samples was investigated by powder x-ray diffraction (XRD). 
XRD patterns (room temperature and high temperature) were collected with a D8 ADVANCE (Bruker) diffractometer with Cu Ka radiation. 
XRD patterns were collected in the temperature range 25-900oC, 5oC min-1, with 1 h temperature stabilisation at each step. 

temperature: 20, 100, 200, 250, 300, 350, 400, 500, 600, 700, 800, 900oC.


XRD patterns for 6A 7A-B
BaFe0.6Co0.3Nb0.1O3-x
the data is in XRD "raw" format

Samples of BaFe0.6Co0.3Nb0.1O3-x (BFCN) were prepared via the conventional solid-state reaction method. 
Analytical-grade powders BaCO3, Fe2O3, Co3O4, Nb2O5, (commercially available) were initially mixed with a mortar and pestle; 
according to the molar ratios of Ba:Fe:Co:Nb = 1:0.6:0.3:0.1 a
The obtained mixtures were heated first at 950 then at 1,050oC (BFCN) for 12 h.

grounded with a mortar and pestle before XRD