ACCURATE ESTIMATES OF COVALENT LATTICE-SUMS VIA CHEBYSHEV POLYNOMIALS

The problem of slow convergence in sequential estimates of covalent la ttice constants is overcome by employing a new linear convergence acce lerator. Chebyshev polynomials have been exploited to generate this tr ansformation. It is simple, sufficiently accelerative and expressible in a closed form, thus providing enough computational convenience. Per formance of the scheme with relation to a few others is tested. Demons trative calculations highlighting its worth and efficiency involve the rapid and accurate evaluation of a few cubic lattice constants.