function [ x, y, z, w ] = ld0170 ( )

%*****************************************************************************80
%
%% LD0170 computes the 170 point Lebedev angular grid.
%
%  Modified:
%
%    14 September 2010
%
%  Author:
%
%    Dmitri Laikov
%
%  Reference:
%
%    Vyacheslav Lebedev, Dmitri Laikov,
%    A quadrature formula for the sphere of the 131st
%    algebraic order of accuracy,
%    Russian Academy of Sciences Doklady Mathematics,
%    Volume 59, Number 3, 1999, pages 477-481.
%
%  Parameters:
%
%    Output, real X(N), Y(N), Z(N), W(N), the coordinates
%    and weights of the points.
%
  n = 0;
  x = zeros(170,1);
  y = zeros(170,1);
  z = zeros(170,1);
  w = zeros(170,1);
  a = 0.0;
  b = 0.0;
  v = 0.5544842902037365E-02;
  [ n, x, y, z, w ] = gen_oh ( 1, n, a, b, v, x, y, z, w );
  v = 0.6071332770670752E-02;
  [ n, x, y, z, w ] = gen_oh ( 2, n, a, b, v, x, y, z, w );
  v = 0.6383674773515093E-02;
  [ n, x, y, z, w ] = gen_oh ( 3, n, a, b, v, x, y, z, w );
  a = 0.2551252621114134;
  v = 0.5183387587747790E-02;
  [ n, x, y, z, w ] = gen_oh ( 4, n, a, b, v, x, y, z, w );
  a = 0.6743601460362766;
  v = 0.6317929009813725E-02;
  [ n, x, y, z, w ] = gen_oh ( 4, n, a, b, v, x, y, z, w );
  a = 0.4318910696719410;
  v = 0.6201670006589077E-02;
  [ n, x, y, z, w ] = gen_oh ( 4, n, a, b, v, x, y, z, w );
  a = 0.2613931360335988;
  v = 0.5477143385137348E-02;
  [ n, x, y, z, w ] = gen_oh ( 5, n, a, b, v, x, y, z, w );
  a = 0.4990453161796037;
  b = 0.1446630744325115;
  v = 0.5968383987681156E-02;
  [ n, x, y, z, w ] = gen_oh ( 6, n, a, b, v, x, y, z, w );
  
  return
end