Atom
====

Overview
--------
A simple 3D coordinate container used in basis and molecule definitions.

Constructors
------------
.. code-block:: python

   Atom(x, y, z)
   Atom([x, y, z])
   Atom(np.array([x, y, z]))

Notes
-----
* Coordinates are simple fixed-size arrays exposed to Python as lightweight
  wrappers. See binding source for utility constructors.