spindeterminants
  n_det_alpha     integer
  n_det_beta      integer
  n_int           integer
  bit_kind        integer
  n_states        integer
  psi_det_alpha   integer*8 (spindeterminants_n_int*spindeterminants_bit_kind/8,spindeterminants_n_det_alpha)
  psi_det_beta    integer*8 (spindeterminants_n_int*spindeterminants_bit_kind/8,spindeterminants_n_det_beta)
  psi_coef_matrix double precision (spindeterminants_n_det_alpha,spindeterminants_n_det_beta,spindeterminants_n_states)