fractional crystallization
41radium — /ray dee euhm/, n. 1. Chem. a highly radioactive metallic element whose decay yields radon gas and alpha rays. Symbol: Ra; at. wt.: 226; at. no.: 88. 2. a lustrous rayon or silk fabric constructed in plain weave and used in women s apparel,… …
42Hafnium — lutetium ← hafnium → tantalum Zr ↑ Hf ↓ Rf …
43Moon — This article is about Earth s Moon. For moons in general, see Natural satellite. For other uses, see Moon (disambiguation) …
44Rock microstructure — includes the texture of a rock and the small scale rock structures. The words texture and microstructure are interchangeable, with the latter preferred in modern geological literature. However, texture is still acceptable because it is a useful… …
45Mount Pleasant Caldera — Elevation approx. 248 m (814 ft) Listing List of volcanoes in Canada …
46fractionation — frac tion*a tion n. the act or process of separating a mixture into portions of different composition, as in distillation or {fractional crystallization}. Syn: fractional process. [WordNet 1.5 +PJC] 2. (Petroleum industry) Separation of crude oil …
47Hafnium(IV) chloride — IUPAC name Hafnium(IV) chloride Hafnium tetrachloride …
48Caesium — xenon ← caesium → barium Rb ↑ Cs ↓ Fr …
49Samarium — promethium ← samarium → europium ↑ Sm ↓ …
50Formation of rocks — This article discusses how rocks are formed. There are also articles on physical rock formations, also known as strata, and the formal naming of geologic formations. The three main ways rocks are formed: * Sedimentary rocks are formed through the …
