waves (SAW) on doubly rotated cuts of alpha quartz are presented. Results of a numerical study of the properties of surface acoustic First and second order TCF's have been calculated on a l o " x 10" K 10" grid spanning the range of angles (XY wlt) 0 to 3Oo/-9O0 to 90°/0 to 180". The Finite Difference method was em lo ed SAW velocities were calculated at -50°C, 25"C, and 1 0 0 "~. &e corresponding frequencies were determined and curve fitted. Angular maps created from the data base by these

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... ulations were used to with zero first order TCF and small second order TCF's have been identify zero first and second order TCF surfaces. Families of cuts as l.O' x 1.0" x 1.0'). identified and further explored on smaller angular grids (as small The results of Sinha and Tiersten's approach are correlated with the finite difference method and used to find cutswith zero first order TCF. Families of cuts on alpha quartz with SAW temperature stability superior to that found on ST cut Quartz are identified. Coupling coefficients, powerflow angles, phase-temperature plot sand other parameters are given for selected cuts.