By R. H. Mitchell, M. I. Novgorodova, E. I. Semenov (auth.), Prof. Dr. A. S. Marfunin (eds.)

All present introductory experiences of mineralogy are written accord­ ing to an analogous set of rules, also known as the "Dana approach of Mineralogy". Even glossy complex handbooks, that are cer­ tainly invaluable, comprise easy information on minerals and are primarily descriptive. whilst simple details at the chemistry, constitution, optical and actual houses, unusual gains and para­ genesis of 200-400 minerals is gifted, then there's virtually no additional house to be had to incorporate new principles and ideas in response to fresh mineral reports. a potential approach to this challenge will be to offer a booklet starting the place introductory textbooks finish for these already famil­ iar with the straight forward innovations. this sort of quantity will be adapted to experts in all fields of technology and undefined, drawn to the newest ends up in mineralogy. This process will be known as complex Mineralogy. right here, an test has been made to survey the present percentages and goals in mineral subject investigations, together with the most features of all of the equipment, crucial difficulties and issues of mineral­ ogy, and similar reports. the person volumes are composed of brief, condensed chap­ ters. each one bankruptcy provides in an entire, albeit condensed, shape particular difficulties, tools, theories, and instructions of investigations, and estimates their value and strategic place in technology and industry.

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Extra info for Advanced Mineralogy: Volume 1 Composition, Structure, and Properties of Mineral Matter: Concepts, Results, and Problems

Example text

The N commonly occurs in discrete aggregates termed platelets. These may have formed by aggregation of substitutional nitrogen atoms subsequent to the growth of the diamond. Occluded gases (N 2 ,C0 2 ,CH 4 ) in graphite may form clathrate impurities in the interlayer spaces. Other impurities in minerals arise from the adsorption or precipitation of finely dispersed, commonly colloidal compounds, on crystal faces during growth. This material may recrystallize into aggregates of microinclusions. Common examples are the hydroxides of Fe and Mn included in the citrine and rose varieties of hydrothermal quartz.

Lima-de-Faria et al. also give the so-called Bauverband description indicating structure types by a latticecomplex notation. ) and the packing of structural units, as well as the coordination of atoms and the presence of interstitial atoms. Use ofthe full notation is suitable for relatively simple inorganic compounds, but is impractical for many minerals which have complex chemistry and structure, and for these a system like that of Strunz (1982), giving less complete structural information, is more appropriate.

Addition of new or different data can either follow the groupings already established by earlier classifications or provide a completely new classification. Classifications can be based on a great variety of measures of similarity, dissimilarity, distance, and other criteria. In addition, the various statistical methods for classifying objects are all slightly different mathematically. Thus, one can learn different things by using different methods on the same set of mineralogical data. A classification by one method can be compared to another by a different method to see which may establish the better classification in each situation.

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