ISSN:
1432-0967
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Geologie und Paläontologie
Notizen:
Abstract A study of the behavior of the lattice constants of common pyroxenoids and pyroxenes, especially bustamites and rhodonites, reveals that calcium causes the lattices of pyroxenes and rhodonites to expand more anisotropically than those of bustamites or wollastonites. Thus, the chain silicates are characterized by two different types of expansion. In the second part of the paper an attempt is made to correlate the chemical compositions and unit cell parameters of bustamites and rhodonites using the data of 14 bustamites and 33 rhodonites, most of which were investigated in this work. In the case of bustamites, the chemical composition can be determined using the lattice parameters,b and d100. In the case of rhodonites, the amount of calcium can be determined very accurately, and that of magnesium can be estimated to an accuracy of 3–4 mole-%.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00592940
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