Table.1 The sample stoichiometry of YbFe2O4.

From: Direct evidence of electronic ferroelectricity in YbFe2O4 using neutron diffraction and nonlinear spectroscopy

Raw material rate

Fe2O3/Yb2O3 (mol)

Fe/Yb rate (evaluated by XRF)

Stoichiometry of oxygen YbFexOy (evaluated by TGA)

Average of Fe valence

2.00

1.79(3)

x = 1.79, y = 3.775(5)

2.542(5)

2.20

1.95(3)

x = 1.95, y = 3.960(5)

2.523(5)

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