There are 14 Bravais lattices. They are represented by a two-letter symbol: aP, mP, mS, oP, oS, oF, oI, tP, tI, hP, hR, cP, cF, cI
bravais(bt = NULL)
A two-letter character, denoting the Bravais type.
An object of class "bravais". It is a named list of length 4. The first slot, "bt", is the universally-used two-letter symbol. The second, third and fourth slots are, respectively, "cr_fam" (the corresponding crystal family), "cr_sys" (the corresponding crystal system) and "lt_sys" (the corresponding lattice system).
# mS is a monoclinic, face-centred Bravais lattice bt <- bravais("mS") class(bt) bt[1:4]
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