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The two octahedral cells project onto the entire volume of this envelope, while the 8 triangular prismic cells project onto its 8 triangular faces. The triangular-prism-first orthographic projection of the octahedral prism into 3D space has a hexagonal prismic envelope. The two octahedral cells project onto the two hexagonal faces.
A high-index reflective subgroup is the prismatic octahedral symmetry, [4,3,2] (), order 96, subgroup index 4, (Du Val #44 (O/C 2;O/C 2) *, Conway ± 1 / 24 [O×O].2). The truncated cubic prism has this symmetry with Coxeter diagram and the cubic prism is a lower symmetry construction of the tesseract, as .
Site name Area of Search Reason for designation Area Grid reference Year in which notified Map; Biological interest Geological interest Hectares Acres The Wash: Norfolk / Lincolnshire 63,135.0 156,010.0 1972 North York Moors: North Yorkshire / Cleveland 44,087.7 108,943.1 1998 Humber Estuary: East Riding of Yorkshire / Lincolnshire
South Yorkshire shown within the UK. This is a list of Sites of Special Scientific Interest (SSSIs) in South Yorkshire, United Kingdom.As of 2009, There are 35 sites designated within this Area of Search, of which 18 have been designated due to their biological interest, 14 due to its geological interest, and 3 for both biological and geological interest. [1]
Whin Fell, part of the Bowland Fells SSSI. The list below shows the 69 Sites of Special Scientific Interest (SSSIs) in the Lancashire area of search. Note that English Nature, the designating body for SSSIs in England, uses the 1974-1996 county system, and this list follows the same approach.
This is a list of the Sites of Special Scientific Interest (SSSIs) in Greater Manchester, a metropolitan county in North West England. In England the body responsible for designating SSSIs is Natural England , which chooses a site because of its fauna , flora , geological or physiographical features. [ 1 ]
Site name Reason for designation Area Grid reference [B] Year in which notified Map [C] Biological interest Geological interest Hectares Acres Aller and Beer Woods Y 56.9 140.6 ST404305 1952 Map Aller Hill Y 18.4 45.4 ST408291 1988 Map Asham Wood Y 141.6 347.5 ST705460 1963 Map Axbridge Hill and Fry's Hill Y 67.1 160.1 ST433555 1990 Map Babcary Meadows Y 13.6 31.6 ST567293 1988 Map River Barle ...
This is a list of the Sites of Special Scientific Interest (SSSIs) in the Powys Area of Search (AoS). [1] Sites. Abercriban Quarries; Aberithon and Bedw Turbaries;