Chapter V: The Academic and Professional Preparation of Teachers of Science

Smith, Hilton A.; Homman, Guy B.

doi:10.3102/00346543031003289

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1999

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“…38 3D nets are members of the up±down-hex group for which the simpler members were described by Smith (1977), and further ones will be given by Smith (1999b). Five examples are shown in Fig.…”

Section: D Subunitsmentioning

confidence: 99%

Enumeration of four-connected three-dimensional nets. II. Conversion of edges of three-connected 2D nets into zigzag chains

Han

Smith

1999

Acta Cryst Sect A

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Four-connected three-dimensional (3D) nets were systematically enumerated by converting some horizontal edges of a vertical stack of three-connected two-dimensional (2D) nets into vertical zigzag chains. 77 out of 131 2D nets were selected for enumeration, and different arrangements of zigzag edges and horizontal edges were investigated. This yielded 138 3D nets of which 19 are represented by known structures: cristobalite; tridymite; MAPO-39 (International Zeolite Association Structure Commission code ATN); svyatoslavite; Li-A(BW) (ABW); cancrinite (CAN); AlPO-31 (ATO); MAPO-36 (ATS); BaFe(2)O(4); 'nepheline hydrate' (JBW); bikitaite (BIK); KBGe(2)O(6); CsAlSi(5)O(12) (CAS); UiO-6 (OSI); Theta-1 (TON); ZSM-12 (MTW); ZSM-23 (MTT); AlPO-53C; and CIT-5 (CFI).

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Section: D Subunitsmentioning

confidence: 99%