quartz crystal unit
71amorphous solid — ▪ physics Introduction any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel. Solids and liquids (liquid) are both forms of condensed… …
72Cornubite — from Majuba Hill, Nevada, USA. Specimen size 5 cm General Category Arsenate minerals Chemical …
73Geology of the Australian Capital Territory — Australia grew around three fused pieces of very ancient continental crust (cratons). The geology of the Australian Capital Territory includes rocks dating from the Ordovician around 480 million years ago, whilst most rocks are from the Silurian …
74Carbon nanotube — Not to be confused with Carbon fiber. Part of a series of articles on Nanomaterials Fullerenes …
75Heraeus — Infobox Company company name = Heraeus Holding GmbH company type = Gesellschaft mit beschränkter Haftung/ Private foundation = 1851 location city = Hanau location country = Germany key people = Wilhelm Carl Heraeus, Founder Dr. Jürgen Heraeus,… …
76pyroxene — pyroxenic /puy rok sen ik/, adj. /puy rok seen, peuh , puy rok seen /, n. any of a very common group of minerals of many varieties, silicates of magnesium, iron, calcium, and other elements, occurring as important constituents of many kinds of… …
77Space group — In mathematics and geometry, a space group is a symmetry group, usually for three dimensions, that divides space into discrete repeatable domains. In three dimensions, there are 219 unique types, or counted as 230 if chiral copies are considered… …
78Cleusonite — General Category Oxide minerals Chemical formula (Pb,Sr)(U4+,U6+)(Fe2+,Zn)(Ti,Fe2+,Fe3+)18(O,OH)38 Strunz classification 0 …
79Mount Cayley volcanic field — Coordinates: 50°07′13″N 123°17′26″W / 50.12028°N 123.29056°W / 50.12028; 123.29056 …
80Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium …
