Database of Disordered Zeolite Structures

Intergrowth Family **SSZ-70**

Periodic Building Unit

Periodic Building Unit (PerBU): | MWW layer | |||||

Layer symmetry | P (6) m m | |||||

2D cell parameters | a = 14.23 Å |
b = 14.23 Å |
gamma = 120° | |||

Connectivity pattern

Examples |

The layers are stacked along the [001] direction using the following connectivity patterns

| |||||||||||||||||

^{*} relative to the previous layer |

Effect on channel system | |

The disorder partly blocks the channel system between the layers, but not the one within the layer |

Simplest ordered end members

The color of each layer reflects the symmetry/translation operation used to generate it from the previous layer (see table above).

Polymorph SSZ-70_A | |||||

Cell Parameters: | hexagonal | P 6_{3}/m m c: (# 194) |
|||

a = 14.2270 Å |
b = 14.2270 Å |
c = 49.8060 Å |
|||

α = 90.0000° | β = 90.0000° | γ = 120.0000° | |||

Volume = | 8730.1 Å^{3} |
||||

Framework Density (FD_{Si}): |
16.3 |

Ring sizes (# T-atoms): | 14 10 6 5 4 | ||

Channel dimensionality: | Topological (pore opening > 6-ring): 2-dimensional |

Maximum diameter of a sphere: | |||||||

that can be included | 7.86 Å | ||||||

that can diffuse along | a: 4.71 Å | b: 4.71 Å | c: 2.58 Å | ||||

[1 0 0] : 4.71 Å | |||||||

addional volume data |

Composite Building Units: |

d6r | mel | |||

In this space group and setting, the PerBUs are stacked along [001] |

Note: This polymorph has NOT been observed as a pure ordered material | |

Polymorph SSZ-70_B | |||||

Cell Parameters: | hexagonal | R -3 m:H (# 166) | |||

a = 14.3962 Å |
b = 14.3962 Å |
c = 75.5875 Å |
|||

α = 90.0000° | β = 90.0000° | γ = 120.0000° | |||

Volume = | 13566.8 Å^{3} |
||||

Framework Density (FD_{Si}): |
15.7 |

Ring sizes (# T-atoms): | 14 10 6 5 4 | ||

Channel dimensionality: | Topological (pore opening > 6-ring): 2-dimensional |

Maximum diameter of a sphere: | |||||||

that can be included | 8.43 Å | ||||||

that can diffuse along | a: 4.93 Å | b: 4.93 Å | c: 2.54 Å | ||||

[1 0 0] : 4.93 Å | |||||||

addional volume data |

Composite Building Units: |

d6r | mel | |||

In this space group and setting, the PerBUs are stacked along [001] Adjacent layers generated by the same connectivity pattern (same basic color) are shown with different shades for clarity. |

Note: This polymorph has NOT been observed as a pure ordered material | |

Polymorph SSZ-70_C | |||||

Cell Parameters: | hexagonal | P 6/m m m: (# 191) | |||

a = 14.3900 Å |
b = 14.3900 Å |
c = 25.1980 Å |
|||

α = 90.000° | β = 90.000° | γ = 120.000° | |||

Volume = | 4518.8 Å^{3} |
||||

Framework Density (FD_{Si}): |
15.9 |

Ring sizes (# T-atoms): | 10 6 5 4 | ||

Channel dimensionality: | Topological (pore opening > 6-ring): 2-dimensional |

Maximum diameter of a sphere: | |||||||

that can be included | 9.69 Å | ||||||

that can diffuse along | a: 4.92 Å | b: 4.92 Å | c: 2.6 Å | ||||

addional volume data |

Composite Building Units: |

d6r | mel | |||

In this space group and setting, the PerBUs are stacked along [001] Adjacent layers generated by the same connectivity pattern (same basic color) are shown with different shades for clarity |

Note: This polymorph corresponds to the ordered framework MWW | |

Disorder Example

There is no blocking of the 2D channel system. |