It has been established by X-ray diffraction and electron microscopy that in glasses of the La 2 O 3 - B 2 O 3 - GeO 2 a film texture of lanthanum germanate La 2 Ge 2 O < sub> 7 with a thickness of up to 5 ?m, under which a needle-shaped texture of the stillwellite-like LaBGeO 5 with pyroelectric properties is formed. The temperature dependences of the dielectric and pyroelectric properties of samples with a sandwich structure La 2 Ge 2 O 7 - LaBGeO 5 - La 2 Ge 2 O 7 and polished samples containing only the stillwellite-like phase. Il. 9, bibliography: 12 titles.
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