phenakite group

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Contributions to the crystallization of willemite
Samuel Lewis Penfield

American Journal of Science April 1894, s3-47 (280) 305-309; DOI: https://doi.org/10.2475/ajs.s3-47.280.305
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Some observations on the beryllium minerals from Mount Antero
Samuel L. Penfield

American Journal of Science December 1890, s3-40 (240) 488-490; DOI: https://doi.org/10.2475/ajs.s3-40.240.488
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Phenacite from Colorado
Samuel L. Penfield

American Journal of Science February 1887, s3-33 (194) 130-135; DOI: https://doi.org/10.2475/ajs.s3-33.194.130
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Contributions to mineralogy
William Earl Hidden

American Journal of Science September 1886, s3-32 (189) 204-211; DOI: https://doi.org/10.2475/ajs.s3-32.189.204
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Mineralogical notes
William Earl Hidden

American Journal of Science March 1885, s3-29 (171) 249-251; DOI: https://doi.org/10.2475/ajs.s3-29.171.249
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Notes on some interesting minerals occurring near Pikes Peak, Colorado
Charles Whitman Cross and W. F. Hillebrand

American Journal of Science October 1882, s3-24 (142) 281-286; DOI: https://doi.org/10.2475/ajs.s3-24.142.281
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On willemite and tephroite
William G. Mixter

American Journal of Science September 1868, s2-46 (137) 230-232; DOI: https://doi.org/10.2475/ajs.s2-46.137.230

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