:term:`STABILITY_AUGMENT_SPACE_TOL <STABILITY_AUGMENT_SPACE_TOL (DCFT)>`
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      The value of the rms of the residual in Schmidt orthogonalization which is used as a threshold for augmenting the vector subspace in stability check 

      * **Type**: :ref:`conv double <op_c_conv>`
      * **Default**: 0.1