- trigonal pyramid
- 三方锥
English-Chinese geology dictionary (英汉地质大词典). 2013.
English-Chinese geology dictionary (英汉地质大词典). 2013.
Trigonal pyramidal molecular geometry — Infobox molecular geometry Symmetry group= C3v Electron direction=4 Atom direction=3 Bond angle … Wikipedia
Pyramid (disambiguation) — A pyramid is any three dimensional structure where the upper surfaces are triangular and converge at one point. Pyramid may also refer to:* Pyramid (geometry), a conic solid with polygonal base * Egyptian pyramids, the pyramids of Egypt **… … Wikipedia
Pyramid (geometry) — This article is about the polyhedron pyramid (a 3 dimensional shape); for other versions including architectural Pyramids, see Pyramid (disambiguation). An n sided pyramid is a polyhedron formed by connecting an n sided polygonal base and a point … Wikipedia
VSEPR theory — Valence shell electron pair repulsion (VSEPR) theory is a model in chemistry used to predict the shape of individual molecules based upon the extent of electron pair electrostatic repulsion.[1] It is also named Gillespie–Nyholm theory after its… … Wikipedia
Ammonia — For other uses, see Ammonia (disambiguation). Ammonia … Wikipedia
Carbanion — A carbanion is an anion in which carbon has an unshared pair of electrons and bears a negative charge usually with three substituents for a total of eight valence electrons [Organic Chemistry Robert Thornton Morrison, Robert Neilson Boyd] . The… … Wikipedia
Hydronium — Hydronium … Wikipedia
Nitrogen inversion — in ammonia Inversion of an amine. The pair of dots represents the lone electron pair on the nitrogen atom. In chemistry, a nitrogen compound like … Wikipedia
Iodate — An iodate is a salt of iodic acid. [ [http://www.m w.com/cgi bin/dictionary?book=Dictionary va=iodate Merriam Webster definition] ] In the iodate anion, iodine is bonded to three oxygen atoms and the molecular formula is IO3−. The molecular… … Wikipedia
TPY — [Abk. für engl. trigonal pyramid = trigonale Pyramide]: ein kursiv zu setzendes ↑ Polyedersymbol … Universal-Lexikon
Quartz — This article is about the mineral. For other uses, see Quartz (disambiguation). Quartz Quartz crystal cluster from Tibet General Category … Wikipedia