Crystal structure of Trona is determined by Brown, et al the structure includes of three joint edge of polyhedral (octahedron central sided by his seven pages), cross-linked by hydrogen bonds and carbonate. Curry and Bacon refined the structure using 2 -dimensional single-crystal neutron diffraction and pointed out that hydrogen atoms in a symmetrical (HC2O6)3- ions in a mess. Environment of H atoms are organized for later review by Choi and Mighell at 23 ° C and the three-dimensional single-crystal neutron diffraction.