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- W1996125366 abstract "The nuclear positions in a single crystal of ${mathrm{B}mathrm{a}(mathrm{N}{mathrm{O}}_{2})}_{2}$ifmmodecdotelsetextperiodcenteredfi{}${mathrm{H}}_{2}$O at 20, 102, and 298 K have been measured by neutron diffraction, and the change in spontaneous polarization between 20 and 300 K has been continuously determined. A polarization change of -30 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}4}$ ${mathrm{Cm}}^{ensuremath{-}2}$ between 102 and 298 K is calculated from the nuclear positions, based upon an electric dipole moment of 6.2 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}30}$ Cm for ${mathrm{H}}_{2}$O and 6 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}30}$ Cm for N${mathrm{O}}_{2}^{ensuremath{-}}$ and the charge on N${mathrm{O}}_{2}^{ensuremath{-}}$ as midway between the oxygen atoms. Integral ionic charges are assumed. The measured polarization change between 102 and 298 K is -26 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}4}$ ${mathrm{Cm}}^{ensuremath{-}2}$. The calculated polarization change between 20 and 102 K is -5 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}4}$ ${mathrm{Cm}}^{ensuremath{-}2}$; the experimental value is +3 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}4}$ ${mathrm{Cm}}^{ensuremath{-}2}$. The error in the calculated spontaneous polarization is estimated at 10 ifmmodetimeselsetexttimesfi{} ${10}^{ensuremath{-}4}$ ${mathrm{Cm}}^{ensuremath{-}2}$." @default.
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- W1996125366 date "1982-12-15" @default.
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- W1996125366 title "Temperature dependence of the nuclear positions and spontaneous polarization in pyroelectric<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>B</mml:mi><mml:mi mathvariant=normal>a</mml:mi><mml:mo>(</mml:mo><mml:mi mathvariant=normal>N</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>O</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:…" @default.
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- W1996125366 doi "https://doi.org/10.1103/physrevb.26.6896" @default.
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