GEOL-2126EL Lecture Notes - Kamacite, Banded Iron Formation, Taenite
16 May 2013
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Document Summary
Naturally occurring solid with highly ordered atomic arrangement and a definite chemical formula. Highly ordered atomic arrangement=long range 3d internal order of atoms. Bounded by smooth plane surfaces, assume regular geometric forms. Crystal habit -general shape of crystal (distorted, elongated, stocky) Flourescence -emmision of light during exposure from uv or x-rays. Tendancy of minerals to break parallel to atomic planes. Breaking along planes of weakness produced by pression, or twinning. The way minerals break when there is no cleavage or parting. Resistance of mineral to breaking, crushing, bending, tearing. Ratio between weight of material vs weight of water. S (2) p (6) d (10) f (14) orbitals. Strength of bond = valence/cn# (eg [6]na(1+) = +1/6) Structure will be stable if sum of bonds = charge of anion. =study of crystalline solids & the principles that govern their growth, external shape, and internal structure. =internal arrangement of atoms and the internal symmetry.
