Drill: a computer program to aid in building ball and spoke crystal models

M. E. Gunter, Robert T Downs

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Drill is a Fortran computer program that, based upon crystal structure data, performs the required calculations to build ball and spoke models of crystals. Ball and spoke representations of minerals provide the best representation of the crystal structure of a mineral and are invaluable in teaching and research. Unfortunately, models of complex silicate minerals may contain 500 or more atoms (balls) and cost several thousand dollars. With the aid of Drill, an orienting ball drill, and a supply of plastic balls, these same models can be made at one-tenth, or less, the commercial price. Drill also generates all the atomic positions, bond lengths, and bond angles in the unit cell of a mineral, if given the cell parameters, the general positions of the atoms, and the space group. -Authors

Original languageEnglish (US)
Pages (from-to)293-294
Number of pages2
JournalAmerican Mineralogist
Volume76
Issue number1-2
StatePublished - 1991
Externally publishedYes

Fingerprint

spokes
balls
Computer program listings
aid
crystal
computer programs
Minerals
software
crystal structure
Crystals
minerals
mineral
crystals
Crystal structure
silicate mineral
Silicate minerals
Atoms
teaching
Bond length
plastic

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Drill : a computer program to aid in building ball and spoke crystal models. / Gunter, M. E.; Downs, Robert T.

In: American Mineralogist, Vol. 76, No. 1-2, 1991, p. 293-294.

Research output: Contribution to journalArticle

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