Porous titanosilicate nanorods in the structure of yuksporite, [(Sr,Ba).sub.2][K.sub.4][(Ca,[Na).sub.14]([not less than],Mn,Fe) {[(Ti,Nb).sub.4][(O,OH).sub.4][[Si.sub.6][O.sub.17].sub.2] [Si.sub.2][O.sub.7].sub.3]} [([H.sub.2]O,OH].sub.n], resolved using synchrotron radiation

The crystal structure of yuksporite. [(Sr.Ba).sub.2] [K.sub.4][(Ca,Na).sub.14]([cube root],Mn,Fe){[(Ti,Nb).sub.4][(O.OH).sub.4][[Si.sub.6] [O.sub.17].sub.2][[Si.sub.2] [O.sub.7].sub.3]}[(H.sub.2][O.OH).sub.n], where n ~ 3 [monoclinic. P[2.sub.1]/m, a = 7.126(3). b = 24.913(6). c = 17.075(7) [Angstrom]. [beta] = 101.89(3)[degrees], V=2966.4(17) [Angstrom].sup.3] has been solved using X-ray synchrotron radiation data collected from a needle-like crystal with dimensions of 6 x 6 x 50 [micro][m.sup.3] at the Swiss-Norwegian beamline BM01 of the European Synchrotron Research Facility (ESRF. Grenoble, France). The structure was refined to [R.sub.1] = 0.101 on the basis of 2359 unique observed reflections with |F [sub.0]| [greater than or equal to] 4[[sigma].sub.f]. The structure of yuksporite is based upon titanosilicate nanorods elongated along a and with an elliptical cross-section of ca. 16 x 19 [Angstrom] = 1.6 x 1.9 nm. Silicate tetrahedra form double xonotlite-like chains [sup.1.sub.[infinity]] [[Si.sub.6][O.sub.17]] oriented parallel to (00l). Two [sup.1.[infinity][[Si.sub.6][O.sub.17]] chains are linked into a rod via Ti[O.sub.6] octahedra and [Si.sub.2][O.sub.7] double tetrahedra. The {[(Ti.Nb).sub.4][(O.OH).sub.4][[[Si.sub.6][O.sub.17]].sub.2] [[[Si.sub.2][O.sub.7]].sub.3]} nanorods are porous. The internal pores are defined by eight-membered rings (SMR) with open diameters of 3.2 [Angstrom]. The interior of the titanosilicate nanorods is occupied by St, Ba. K. and Na cations and [H.sub.2]O molecules. The nanorods are separated by walls of Ca coordination polyhedra that are parallel to (010) and link the rods into a three-dimensional structure.