code: public Matrix4d[] getTransformationsOrthonormal() {
  		Matrix4d[] transfs = new Matrix4d[this.getSpaceGroup().getNumOperators()];
  		transfs[0] = new Matrix4d(this.getSpaceGroup().getTransformation(0)); // no need to transform the identity
  		for (int i=1;i<this.getSpaceGroup().getNumOperators();i++) {
  			transfs[i] = this.cell.transfToOrthonormal(this.getSpaceGroup().getTransformation(i));
  		}
  		return transfs;
  	}
docs: Gets all symmetry transformation operators corresponding to this structure's space group
  (including the identity, at index 0) expressed in the orthonormal basis. Using PDB axes
  convention (NCODE=1).
  @return an array of size {@link SpaceGroup#getNumOperators()}