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R. T. Downs
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Journal Article

New data on hemihedrite from Arizona

B. Lafuente, R. T. Downs, M. J. Origlieri, K. J. Domanik, R. B. Gibbs, M. S. Rumsey
Published: 01 August 2017
Mineralogical Magazine (2017) 81 (4): 1021–1030.
DOI: https://doi.org/10.1180/minmag.2016.080.148
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Hydroxycalciomicrolite, Ca 1.5 Ta 2 O 6 (OH), a new member of the microlite group from Volta Grande pegmatite, Nazareno, Minas Gerais, Brazil

M. B. Andrade, H. Yang, D. Atencio, R. T. Downs, N. V. Chukanov, M. H. Lemée-Cailleau, A. I. C. Persiano, A. E. Goeta, J. Ellena
Published: 01 June 2017
Mineralogical Magazine (2017) 81 (3): 555–564.
DOI: https://doi.org/10.1180/minmag.2016.080.116
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A chemical and structural re-examination of fettelite samples from the type locality, Odenwald, southwest Germany

L. Bindi, R. T. Downs, P. G. Spry, W. W. Pinch, S. Menchetti
Published: 01 June 2012
Mineralogical Magazine (2012) 76 (3): 551–566.
DOI: https://doi.org/10.1180/minmag.2012.076.3.07
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Anorpiment, As 2 S 3 , the triclinic dimorph of orpiment

A. R. Kampf, R. T. Downs, R. M. Housley, R. A. Jenkins, J. Hyršl
Published: 01 December 2011
Mineralogical Magazine (2011) 75 (6): 2857–2867.
DOI: https://doi.org/10.1180/minmag.2011.075.6.2857
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The effect of the hedenbergitic substitution on the compressibility of jadeite

F. Nestola, T. Boffa Ballaran, C. Liebske, R. Thompson, R .T. Downs
Published: 01 July 2008
American Mineralogist (2008) 93 (7): 1005–1013.
DOI: https://doi.org/10.2138/am.2008.2773
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High-Temperature–High- Pressure Diffractometry

R. J. Angel, R. T. Downs, L. W. Finger
Published: 01 January 2000
Reviews in Mineralogy and Geochemistry (2000) 41 (1): 559–597.
DOI: https://doi.org/10.2138/rmg.2000.41.16
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Compressibility mechanisms of alkali feldspars; new data from reedmergnerite

R. T. Downs, H. Yang, R. M. Hazen, L. W. Finger, C. T. Prewitt
Published: 01 March 1999
American Mineralogist (1999) 84 (3): 333–340.
DOI: https://doi.org/10.2138/am-1999-0316
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Tetrahedral rigid-body motion in silicates

K. L. Bartelmehs, R. T. Downs, G. V. Gibbs, M. B. Boisen, J. R. Birch
Published: 01 August 1995
American Mineralogist (1995) 80 (7-8): 680–690.
DOI: https://doi.org/10.2138/am-1995-7-805
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The high-pressure crystal chemistry of low albite and the origin of the pressure dependency of Al-Si ordering

R. T. Downs, R. M. Hazen, L. W. Finger
Published: 01 December 1994
American Mineralogist (1994) 79 (11-12): 1042–1052.
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The pressure behavior of α cristobalite

R. T. Downs, D. C. Palmer
Published: 01 February 1994
American Mineralogist (1994) 79 (1-2): 9–14.
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Interactive software for calculating and displaying X-ray or neutron powder diffractometer patterns of crystalline materials

R. T. Downs, K. L. Bartelmehs, G. V. Gibbs, M. B. Boisen
Published: 01 October 1993
American Mineralogist (1993) 78 (9-10): 1104–1107.
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Variation of bond lengths and volumes of silicate tetrahedra with temperature

R. T. Downs, G. V. Gibbs, K. L. Bartelmehs, M. B. Boisen
Published: 01 August 1992
American Mineralogist (1992) 77 (7-8): 751–757.
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A study of the mean-square displacement amplitudes of Si, Al, and O atoms in framework structures; evidence for rigid bonds, order, twinning, and stacking faults

R. T. Downs, G. V. Gibbs, M. B. Boisen
Published: 01 December 1990
American Mineralogist (1990) 75 (11-12): 1253–1267.
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The dependence of the SiO bond length on structural parameters in coesite, the silica polymorphs, and the clathrasils

M. B. Boisen, G. V. Gibbs, R. T. Downs, Philippe D'Arco
Published: 01 August 1990
American Mineralogist (1990) 75 (7-8): 748–754.
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