Porous titanosilicate nanorods in the structure of yuksporite, (Sr,Ba)\\r sub/2sub\\r K\\r sub/4sub\\r (Ca,Na)\\r sub/14sub\\r (□,Mn,Fe) {(Ti,Nb)\\r sub/4sub\\r (O,OH)\\r sub/4sub\\r [Si\\r sub/6sub\\r O\\r sub/17sub\\r ]\\r sub/2sub\\r [Si\\r sub/2sub\\r O\\r sub/7sub\\r ]\\r sub/3sub\\r }(H\\r sub/2sub\\r O,OH)\\r sub/n\\r sub\\r , resolved using synchrotron radiation