Alphabetical Listing for R

• Rager H, Weiser G (1981) Polarized absorption spectra of trivalent chromium in forsterite, Mg2SiO4. Bull Minéral 104:603-609
• Rager H, Hosoya S, Weiser G (1988) Electron paramagnetic resonance and polarized optical absorption spectra of Ni2+ in synthetic forsterite. Phys Chem Mineral 15:383-389
• Rager H, Amthauer G, Bernroider M, Schürmann K (1996) Colour, crystal chemistry and mineral association of a green sphalerite from Steinperf, Dill syncline, FRG. Eur J Mineral 8:1191-1198
• Raju, KS (1977) Radiation effects in calcite. Pramana 8:266-275
• Ramanaiah MV, Ravikumarn RVSSN, Srinivasulu G, Reddy BJ, Rao PS (1996) Detailed spectroscopic studies on cornetite from southern Shaba Zaire. Ferroelectrics 175:175-182
• Ravikumar RVSSN, Chandrasekhar AV, Reddy BJ, Reddy YP, Rao PS (1997) Electronic spectra of cobaltite. In Modern Applications of EPR/ESR from Biophysics to Materials Science, ed. Rudowiz CZ. Springer (Singapore) 1, 523-527.
• Ravikumar RVSSN, N.Madhu N, Chandrasekhar AV, Reddy BJ, Rao PS, Reddy YP (1998) Cu2+, Mn2+ in tetragonal site in chrysocolla. Radiation Effects and Defects in Solids 143:263-272
• Recker K, Neuhaus A, Leckebusch R (1968) Vergleichende Untersuchungen der Garb- und Lumineszenzeigenschaften natürlicher und gezüchteter definiert dotierter Fluorite. Proc Internat Mineral Assoc, Cambridge, 145-152
• Reddy BJ, Lakshman SVJ (1975) Optical absorption spectra of Ni2+ in garnierite: a reply. Canad Mineral 13:300-301
• Reddy BJ, Yamauchi J, Reddy YP, Venkataramanaiah M, Ravikumar RVSSN, Chandrasekhar AV (2002) Optical and EPR Spectra of titanium (III) in lamprophyllite from Kola Peninsula, Russia. Neues Jahrbuch Mineralogie Monatshefte 2002:138-144
• Reddy KM, Moorthy LR, Reddy BJ (1987) Electronic and vibrational absorption-spectra in falcondoite. Sol St Comm 64:1085-1088
• Reddy KM, Jacob AS, Reddy BJ, Reddy YP (1987) Optical-absorption spectra of Cu2+ in brochantite. Phys St Sol B 139:145-150
• Reddy KM, Jacob AS, Reddy BJ (1986) Electron-paramagnetic-resonance and optical-spectra of Cu2+ in dioptase. Ferroelec Lett 6:103-112
• Reddy SL, Reddy KM, Ramesh K, Reddy BJ (1988) Spectral studies of Mn2+ in friedelite. Sol St Comm 66:1169-1171
• Reddy SL, Rao PS, Reddy BJ (1991) Mössbauer, optical absorption and EPR spectra of Fe3+ in plumbo-jarosite minerals. Phys Letters A 161:74-76.
• Reddy SN, Ravikumar RVSSN, Reddy BJ, Rao PS (1995) Optical and EPR spectra of libethenite mineral. Ferroelectrics 166:55-62
• Reddy SN, Ravikumar RVSSN, Reddy BJ, Reddy YP (2000) Chemical and electronic spectral studies of ullmannite. Indian Journal of Engineering & Materials Science 7:459-460
• Reddy SN, Rao PS, Ravikumar RVSSN, Reddy BJ, Reddy YP (2001) Spectral investigations on melanterite mineral from France. Spectrochimica Acta 57:1283-1287
• Reddy SN, Ravikumar RVSSN, Reddy BJ, Reddy YP, Rao PS (2001) Spectroscopic investigations of Fe3+, Fe2+ and Mn2+ bearing antigorite mineral. Neues Jahrbuch Mineralogie Monatshefte 2001:261-270
• Reddy SN, Rao PS, Ravikumar RVSSN, Reddy BJ (2001) EPMA,optical,EPR and IR spectral studies of prehnite mineral. Indian Journal of Physics 75A:429-432
• Reed JS (1971) Optical absorption spectra of Cr3+ in MgO·Al2O3 - MgO·3.5Al2O3 spinels. J Amer Ceram. Soc. 54, 202-204.
• Reinitz IM, Rossman GR (1988) Role of natural radiation in tourmaline coloration. Amer Mineral 73:822-825
• Reinitz IM, Fritsch E, Shigley JE (1998) An oscillating visible light optical center in some natural green to yellow diamonds. Diamond Related Materials 7:313-316
• Richardson SM (1973) A pink muscovite with reverse pleochroism from Archer's Post, Kenya. Amer Mineral 60:73-78
• Richardson SM (1976) Ion distribution in pink muscovite: A reply. Amer Mineral 61:1051-1052
• Rink WJ, Gielisse PJ, Plendl HS (1990) Coloration in electron-irradiated beryl. J Gemm 22:33-37
• Richman I, Kisliuk P, Wong EY (1967) Absorption spectrum of U4+ in zircon (ZrSiO4). Phys Rev 155:262-267
• Robbins DW, Strens RGJ (1968) Polarization-dependence and oscillator streingths of metal-metal charge-transfer bands in iron (II,III) silicate minerals. Chem Comm 1968:508-509
• Robbins DW, Strens RGJ (1972) Charge-transfer ferromagnesian silicates: The polarized electronic spectra of trioctahedral micas. Mineral Mag 38:551-563
• Rossman GR (1974a) Optical spectroscopy of green vanadium apophyllite from Poona, India. Amer Mineral 59:621-622
• Rossman GR (1974b) Lavender jade. The optical spectrum of Fe3+ and Fe2+-Fe3+ intervalence charge transfer in jadeite from Burma. Amer Mineral 59, 868-870
• Rossman GR (1975) Spectroscopic and magnetic studies of ferric iron hydroxy sulfates: Intensification of color in ferric iron clusters bridged by a single hydroxide ion. Amer Mineral 60, 698-704
• Rossman GR (1976a) Spectroscopic and magnetic studies of ferric iron hydroxy sulfates: The series Fe(OH)SO4·nH2O and jarosite. Amer Mineral 61, 398-404
• Rossman GR (1976b) The optical spectroscopic comparison of the ferric iron tetrameric clusters in amarantite and leucophosphite. Amer Mineral 61, 933-938.
• Rossman GR (1980) Pyroxene spectroscopy. In: C.T. Prewet, ed., Pyroxenes. Rev. Mineral 7, 93-116
• Rossman GR, Shannon RD, Waring RK (1981) Origin of the yellow color of complex nickel oxides. J Solid State Chem 39, 277-287.
• Rossman GR, Grew ES, Dollase WA (1982) The colors of sillimanite. Amer Mineral 67;749-761
• Rossman GR (1984) Spectroscopy of Micas. In: S.W. Bailey, ed., Micas. Rev Mineral 13:145-181.
• Rossman GR (1988) Optical Spectroscopy. In: F.C. Hawthorne, ed., Spectroscopic Methods in Mineralogy and Geology. Rev. Mineral 18, 207-254.
• Rossman GR, Fritsch E, Shigley JE (1991) Origin of color in cuprian elbaite from Sao Jos‚ de Batalha, Paraíba, Brazil. Amer Mineral 76, 1479-1484.
• Rossman GR (1996) Why hematite is red: Correlation of optical absorption intensities and magnetic moments of Fe3+ minerals. Mineral Spectroscopy: A tribute to Roger G. Burns. The Geochem Soc, Special Pub 5, eds: MD Dyar, C McCammon, MW Schaefer.
• Rossman GR, Taran MN (2001) Spectroscopic standards for four- and five-coordinated Fe2+ in oxygen-based minerals.  American Mineralogist 86:896-903
• Rossman GR (2006) The mineral spectroscopy server. http://minerals.gps.caltech.edu
• Ruan Y, Dou Y, Li Y, Liu H (1996) Study on the color origin and decoloration of Shandong sapphire. Guisuanyan Xuebao, 24:203-208 (in Chinese)
• Rumyantsev VN, Grum-Grzhimailo SV, Boksha ON (1971) Optical absorption spectra of hydrothermal corundum crystals containing impurities. Soviet Phys Crystallogr. 16:373-374 Translated from Kristallogr 16:445-447
• Runciman WA, Sengupta D, Marshall M (1973) The polarized spectra of iron in silicates. I. Enstatite. Amer Mineral 58:444-450
• Runciman WA, Sengupta D, Gourley JT (1973) The polarized spectra of iron in silicates: II. Olivine. Amer Mineral 58:451-456
• Runciman WA, Sengupta D, Gourley JT (1974) The polarized spectra of iron in silicates: II. Olivine: a reply. Amer Mineral 59:630-631
• Runciman WA, Sengupta D (1974) The spectrum of Fe2+ ions in silicate garnets. Amer Mineral 59:563-566
• Runciman WA (1987) Comment on the spin-forbidden absorption spectrum of Fe2+ in orthopyroxene by Zhao, SB, Wang, HS, Zhou, KW and Xiao, TB. Phys Chem Minerals 14:482
• Rüscher CH, Schrader G (1996) Temperature dependence of small polaron absorption in biotites. Phys Chem Mineral 23:243-245