Better use of NuclideTuple namedtuple in material.py
Better use of NuclideTuple namedtuple in material.py

shikhar413/openmc,smharper/openmc,walshjon/openmc,shikhar413/openmc,smharper/openmc,liangjg/openmc,liangjg/openmc,smharper/openmc,walshjon/openmc,mit-crpg/openmc,shikhar413/openmc,amandalund/openmc,paulromano/openmc,paulromano/openmc,amandalund/openmc,mit-crpg/openmc,paulromano/openmc,amandalund/openmc,paulromano/openmc,liangjg/openmc,mit-crpg/openmc,smharper/openmc,walshjon/openmc,walshjon/openmc,amandalund/openmc,mit-crpg/openmc,liangjg/openmc,shikhar413/openmc