Crystalline compositions

Claim 2

A crystalline composition characterized by the X-ray diffraction pattern having the following characteristic values: ______________________________________ 2-theta d-spacing (A) I/I.sub.0 ______________________________________ 6.76 10.161 ± 0.8 9 10.85 6.340 ± 0.3 100. ______________________________________

Claim 3

The crystalline composition of claim 1 further characterized by the X-ray diffraction pattern having the following characteristic values: ______________________________________ 2-theta d-spacing (A) I/I.sub.0 ______________________________________ 6.76 10.161 ± 0.8 9 10.85 6.340 ± 0.3 100 13.56 5.078 ± 0.2 25 13.98 4.927 ± 0.1 20. ______________________________________

Claim 4

The crystalline composition of claim 1 further characterized by the X-ray diffraction pattern having the following characteristic values: ______________________________________ 2-theta d-spacing (A) I/I.sub.0 ______________________________________ 3.38 20.300 ± 1.5 1 6.76 10.161 ± 0.8 9 10.85 6.340 ± 0.3 100 12.82 5.370 ± 0.2 1 13.56 5.078 ± 0.2 25 13.98 4.927 ± 0.1 20 16.98 4.061 ± 0.1 3 20.40 3.385 ± 0.1 27 21.04 3.284 ± 0.1 16 21.60 3.199 ± 0.1 29 21.80 3.170 ± 0.1 26 22.12 3.125 ± 0.1 39 23.16 2.987 ± 0.1 12. ______________________________________

Claim 5

The crystalline composition of claim 1 comprising multidimensional intersecting channels.

Claim 6

The crystalline composition of claim 4 wherein said channels define pores with at least one diameter larger than 4 angstroms.

Claim 7

A crystalline composition having the 100 unit cell projection set out in FIG. 5b.

Claim 8

A crystalline composition having the 100 unit cell projection set out in FIG. 5b.

Claim 9

The crystalline composition of claim 1 which is a crystalline zincosilicate having a crystalline framework containing three-membered rings and having a framework density of less than 21 tetrahedral atoms per cubic nanometer.

Claim 10

The zincosilicate of claim 7 having the composition (0.9±0.2)M.sub.2/n O:aZnO:(1-a)Al.sub.2 O.sub.3 :xSiO.sub.2 :yH.sub.2 O wherein 0<a≦1, (2-a)≦x≦100, 0≦y≦100 and M represents a cation or cations of valence n.

Claim 11

The zincosilicate of claim 8 wherein a=1.

Claim 12

The zincosilicate of claim 8 comprising multidimensional intersecting channels.

Claim 13

The zincosilicate of claim 10 wherein said channels define pores with at least one diameter larger than 4 angstroms.

Claim 14

The zincosilicate of claim 7 which further exhibits a Si NMR chemical shift ranging from -70 to -80 ppm.

Claim 15

The zincosilicate of claim 7 which has a framework density of less than 18.

Claim 16

The zincosilicate of claim 7 which has a framework density of less than 12.5.

Claim 17

A method for preparing the zincosilicate composition of claim 7 which comprises preparing a reaction mixture containing sources of ZnO, SiO 2 , water, at least one cation M selected from the group consisting of alkali and alkaline earth metals, having a valence of n, and an organic directing agent (DA), having a composition, in terms of mole ratios, within the following ranges: ______________________________________ SiO.sub.2 /ZnO 1 to 200 Al.sub.2 O.sub.3 /SiO.sub.2 0 to 0.2 DA/SiO.sub.2 0 to 5 H.sub.2 O/SiO.sub.2 5 to 80 M.sub.2/n O/SiO.sub.2 ≧0.01 ______________________________________ and thereafter maintaining the reaction mixture under sufficient conditions until crystals of said zincosilicate composition are formed.

Claim 18

The method of claim 15 wherein M is selected from the group consisting of Na and K in a molar ratio of K/Na ranging from 0 to 10 and said reaction mixture has a composition, in terms of mole ratios, within the following ranges: ______________________________________ SiO.sub.2 /ZnO 3 to 50 Al.sub.2 O.sub.3 /SiO.sub.2 0 to 0.1 DA/SiO.sub.2 .05 to 3 H.sub.2 O/SiO.sub.2 10 to 50 M.sub.2/n O/SiO.sub.2 0.1 to 10 ______________________________________ and a pH ranging from 5 to 14.

Claim 19

The method of claim 16 wherein said conditions comprise temperatures from ambient to 250° C. for a period of 1 to 1500 hours, and said directing agent DA is selected from the group consisting of tetramethylammonium, tetraethylammonium, tetrapropylammonium and tetrabutylammonium.

Claim 20

The method of claim 16 wherein said conditions comprise temperature of 150° to 200° C. for a period of 3 to 300 hours.