Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
권호 표지

Spectroscopic Characteristics of Gemstones with Color Change Effect

변색 효과 보석들의 분광학적 특성

  • Ahn, Yong-Kil (Department of Materials & Chemical Engineering, Hanyang University) ;
  • Seo, Jin-Gyo (Division of Materials Science & Engineering, Hanyang University) ;
  • Park, Jong-Wan (Division of Materials Science & Engineering, Hanyang University)
  • 안용길 (한양대학교 공학대학원 보석학과) ;
  • 서진교 (한양대학교 공과대학 신소재공학과) ;
  • 박종완 (한양대학교 공과대학 신소재공학과)
  • Published : 2009.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The luminescence and fluorescence were investigated by photoluminescence spectroscopy for six gemstones which exhibit color change effect. The shape of luminescence peaks appears different when observed by a photoluminescence spectroscopewith a 514 nm Ar laser source. However, it was not possible to observe the difference in the spectra between the natural and synthetic origins for the same type of gemstones. It was found that the photoluminescence spectrum was related to the crystal structure of the stones. Photoluminescence spectra using a 325 nm He-Cd source reveal that fluorescence is relatively strong for synthetic alexandrite, synthetic color change sapphire and natural alexandrite comparing to the rest of gemstones examined.

변색 효과를 보이는 6종의 보석들을 대상으로 UV-Vis 분광분석과 Photoluminescence에 의한 발광 및 형광 특성을 조사하였다. 514 nm Ar이온 source로 PL을 측정한 결과 발광 피크의 모양이 다르게 나타났고 같은 천연과 합성 보석에서는 동일한 피크가 나타났다. 이들 발광 및 형광 특성은 보석들의 결정 구조와 관련이 있음을 관찰할 수 있었다. 325 nm He-Cd source에 의한 형광 조사에서는 합성 알렉산드라이트와 합성 칼라체인지 사파이어 그리고 천연 알렉산드라이트에서 강한 형광이 나타났고 이를 PL 피크로 확인하였다.

Keywords

References

  1. Bigelow, M.S. Lepeshkin, N.N., and Boyd, R.W. (2003) Superluminal and slow light propagation in a room-temperature solid. Science., 301, 200 https://doi.org/10.1126/science.1084429
  2. Farrell, E.F., Fang, J.H., and Newnham, R.E. (1963) Am. Mineral., 48, 804
  3. Garcia-Lastra, J.M., Aramburu, J.A., Barriuso, M.T., and Moreno, M. (2006) Optical properties of $Cr{^{3}^{+}}$-doped oxides: Different behavior of two centers in alexandrite. Physical Review B, 74, 115-118
  4. Geschwind, S. and Remeika, J.P. (1961) Phys. Rev., 122, 757 https://doi.org/10.1103/PhysRev.122.757
  5. Heber, J. and Platz, W. (1979) J. Lumin, 18/19, 170 https://doi.org/10.1016/0022-2313(79)90096-6
  6. Maiman, T.H., Hoskins, R.H., D'Haenens, I.J., Asawa, C.K., and Evtuhov, V. (1961) Stimulated optical emission in fluorescent solids. II. Spectroscopy and stimulated emission in ruby, Phys. Rev., 122(4), 1151-1157
  7. Manson, D.V. and Stockton, C.M. (1984) Pyrope-spes-sartine gamets with unusual color behavior. Gems & Gemology, 20(4), 200-207 https://doi.org/10.5741/GEMS.20.4.200
  8. Miessler, G.L. and Donald, A.T. (2004) Inorganic chemistry (3rd Ed.), Pearson Education, lnc, New Jersey, 344-345
  9. Nassau, K. (1983) The physics and chemistry of color- the fifteen causes of Color, John Wiley & Sons, Inc, U.S.A, 81p
  10. Schmetzer, K. et al., (1980) The Alexandrite effect in minerals; Chrysoberyl, Gamet, Corundum, Fluorite. N. Jb. Miner. Abh., l38, 147-164
  11. Schmetzer, K. and Bernhardt, H-J. (1999) Garnets from Madagascar with a colour change of bluegreen to purple. Gems & Gemology, 35(4), 196-201 https://doi.org/10.5741/GEMS.35.4.196
  12. Schmetzer, K. and Gubelin, E. (1980) Alexandrite-like natural spinel from Sri Lanka. N. Jb. Miner. Mh., H., 9, 428-432
  13. Schmetzer, K. and Ottemann, J. (1979) Kristallchemie und Farbe Vanadium-Haltiger Granate. Neues Jahrbuch fur Mineralogie, Abhandlungen, l36(2), 146-168
  14. Walling, J.C., Peterson, O.G., Jenssen, H.P., Morris, R.C., and Odell, E.W.(1980) Tunable alexandrite lasers. IEEE J. Quantum Electron, QE-16, l302-l315
  15. Werfel, F. and Briimmer, O. (1983) Corundum Structure Oxides Studied by XPS. Physica Scripta., 28, 92-96 https://doi.org/10.1088/0031-8949/28/1/013
  16. Wood, D.L. and Imbusch, G.F. (1968) 야tical spectrum of $Cr{^{3}^{+}}$ ions in spinels. The J. chem phys. V 48(11), 5255-5263 https://doi.org/10.1063/1.1668202