Properties Rhombic dodecahedron

-


a garnet crystal


the rhombic dodecahedron can used tessellate three-dimensional space. can stacked fill space hexagons fill plane.


this polyhedron in space-filling tessellation can seen voronoi tessellation of face-centered cubic lattice. brillouin zone of body centered cubic (bcc) crystals. minerals such garnet form rhombic dodecahedral crystal habit. honey bees use geometry of rhombic dodecahedra form honeycombs tessellation of cells each of hexagonal prism capped half rhombic dodecahedron. rhombic dodecahedron appears in unit cells of diamond , diamondoids. in these cases, 4 vertices (alternate threefold ones) absent, chemical bonds lie on remaining edges.


the graph of rhombic dodecahedron nonhamiltonian.


a rhombic dodecahedron can dissected center 4 trigonal trapezohedra. these rhombohedra cells of trigonal trapezohedral honeycomb. analogous dissection of regular hexagon dissected rhombi, , tiled in plane rhombille.









Comments

Post a Comment

Popular posts from this blog

CACHEbox ApplianSys

-
cachebox230 server appliance cachebox s caching engine employs code squid project. in 2005 launched becta approved protex content filtering service in collaboration east of england broadband network, represent more 2800 schools across 10 authorities. in 2006, acquired assets , customer base of rival freedom2. has since expanded activity north american schools market , caching device requested schools 2015 e-rate funding.
Read more

Kinship systems Apache

-
hide painting depicting apache girl s puberty ceremony, naiche (chiricahua apache), ca. 1900, oklahoma history center the chiricahua language has 4 different words grandparent: -chú maternal grandmother , -tsúyé maternal grandfather , -chʼiné paternal grandmother , -nálé paternal grandfather . additionally, grandparent s siblings identified same word; thus, 1 s maternal grandmother, 1 s maternal grandmother s sisters, , 1 s maternal grandmother s brothers called -chú. furthermore, grandparent terms reciprocal, is, grandparent use same term refer grandchild in relationship. example, person s maternal grandmother called -chú , maternal grandmother call person -chú (i.e. -chú can mean child of either own daughter or sibling s daughter.) chiricahua cousins not distinguished siblings through kinship terms. thus, same word refer either sibling or cousin (there not separate terms parallel-cousin , cross-cousin). additionally, terms used according sex of speaker (unlike english terms broth...
Read more

Western Apache Apache

-
a western apache woman san carlos group western apache include northern tonto, southern tonto, cibecue, white mountain , san carlos groups. while these subgroups spoke same language , had kinship ties, western apaches considered separate each other, according goodwin. other writers have used term refer non-navajo apachean peoples living west of rio grande (thus failing distinguish chiricahua other apacheans). goodwin s formulation: apache peoples have lived within present boundaries of state of arizona during historic times exception of chiricahua, warm springs, , allied apache, , small band of apaches known apache mansos, lived in vicinity of tucson. cibecue western apache group, according goodwin, north of salt river between tonto , white mountain apache, consisting of ceder creek, carrizo, , cibecue (proper) bands. san carlos. western apache group ranged closest tucson according goodwin. group consisted of apache peaks, arivaipa, pinal, san carlos (proper) bands. arivaipa (also ara...
Read more