Crystal optical properties minerals

Crystal elastic constants, 12-33 to 38 Crystal ionic radii, 12-11 to 12 Crystal lattice energy, 12-19 to 31,12-32 Crystal optical properties elements, 12-121 to 145 inorganic compounds, 10-246 to 249 minerals, 4-149 to 155 various materials, 12-146 to 164 Crystal structure... 

The light incident on a mineral surface divides itself in a number of ways. It is partly reflected, partly transmitted, and partly absorbed. Minerals exhibiting metallic bonding have a high reflectivity. Those characterized by ionic or covalent bonding have a high transmissivity. The optical properties are anisotropic they are different in different directions and depend on the arrangement of atoms in the crystals. 

The chemical composition and crystal structure of a mineral determine its physical and optical properties. The diamond crystalline lattice structure (Fig. 4.3.2)... 

The refractive index is the most important optical property and its effect in determining the appearance of the polymer composite has already been referred to above. Amorphous fillers such as glass fibres and beads have only one refractive index, but most mineral fillers are crystalline and have anisotropic crystal structures resulting in a number of different indices, and this can cause complex and undesirable interference effects [27]. 

Measurements of electronic absorption spectra in the visible region not only lead to the evaluation of CFSE s, but they also provide useful information about the crystal chemistry of transition metal ions in the crystal structures and causes of colour and pleochroism of minerals. In this chapter, techniques for measuring absorption spectra of minerals are briefly described and some general applications of the optical spectra to basic crystal chemical properties, such as colour and pleochroism, are discussed. These examples also amplify many of the features of crystal field spectra outlined in chapter 3. 

Mineral species a mineral substance having a specific chemical formula and characteristic physical and optical properties that distinguish it from all others defined by composition and crystal structure. 

Dowty E. and Clarke R. S., Jr. (1973) Crystal structure refinement and optical properties of a Ti fassaite from the Allende meteorite. Am. Mineral. 58, 230-242. 

Mineral name (IMA) (CAS RN) (Synonyms) (Etymology) (ICSD and PDF diffraction files numbers) Theoretical chemical formula, relative molecular mass ( C = 12), mass percentages, coordinence number, major impurities, Strunz s mineral class Crystal system, lattice parameters, Strukturbericht, Pearson symbol, (Z), point group, space group, structure type Optical properties s < II fe C) 3. Other relevant mineralogical, physical, and chemical properties with occurrence... 

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