FIELD: manufacture of crystals for radio engineering. SUBSTANCE: lithium tantalate crystal defined by Euler angles: λ, of approximately 0 deg and μ of about 90 deg, and by angle of wave propagation direction q in the range of +130 to +150 deg, and best of all to be equal to 141.25 deg gives desired effect. EFFECT: unique properties of surface acoustic wave. 12 cl, 2 dwg
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