.. _func-Guinier:

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Guinier
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.. index:: Guinier

Description
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The Guinier model is defined by:

.. math:: I(q) = I_0 \exp{(-R_g^2 q^2 / 3)}

where:
-  :math:`I_0` is the amplitude
-  :math:`R_g` is the radius of gyration

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.. sourcelink::