摘要: Abstract The crystal structure of dehydrated NaX, composition Na 88 Al Si 104 O 384 , a 0 = 25.099(5) A, has been determined using single-crystal X-ray diffraction methods and refined in space group Fd3. Diffraction symmetry T - distances indicate substantial ordering the sites. All + cations were located. Site occupancies on unit cell basis are: site I 2.9, I′ 29.1, II 31.0, III 29.8. ions sites are split between two three closely related positions, respectively.