We have used in Vol.2 the same structural scheme similar they are
organized alphabetically, just for as used in Vol. 1. convenience in
consulting.The alphabetical order We used as the list of minerals the
reference is provisional, it is not an important aspect of the book
Mineral Reference Manual by Nickel and classification, and willtend to
disappear. Nichols, edited by Van Nostrand Reinhold, New In Vol. 1 some
condensed model sheets were York, 1991, and we first organized the
minerals by presented to illustrate the simplicityof the patterns
chemical formulas, from the simpler to the more of the packing layers of
the A, AmB and ApBqC n r complex (Tables 73 to 172), as presented on
page close-packed minerals (Tables lL to 17Lof Vol.1). 1of Vol.1.The
results of the structural studywere The aim was to stimulate the
complete systematic ordered by structural formulas (Tables 27S to
derivation of the simple mineral close-packed 59S). Then we summarized
the classified structure structures, as was tried by the author
(Lima-de- types (not including the tentatively classified) in Faria
(1965) Zeit. Krist., 122, 359-374). In Vol. 2 Tables 60S to 61S. Finally
we presented some the layers are more complex and the correspond- global
results (Tables 62S and 63S). ing condensed models sheets were not
included. In certain cases the general chemical and the The reader
should refer to the book Structural structural formulas may be difficult
to compare.