Flux법에 의한 합성 에메랄드 단결정 육성

박선민; 이철태; 김호건

Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.1, 34-42, February, 1996

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Flux법에 의한 합성 에메랄드 단결정 육성

Growth of Synthetic Emerald Single Crystal by Flux Method

박선민, 이철태, 김호건

초록

합성에메랄드[(BeO)₃(Al_2-xCr_xO₃)(SiO₂)₆〕단결정을 flux법에 의하여 육성하였다. 출발물질로 BeO, Al₂O₃와 SiO₂ 시약을 화학양론비로 혼합하여 사용하였다. 에메랄드 단결정의 성장 조건은 다음과 같다. 온도범위 ; 1150∼900℃, 냉각속도 ; 2, 4, 10℃/hr, 융제 : Li₂CO₃, V₂O₅, 첨가제 ; Cr₂O₃. 에메랄드 단결정의 크기는 2, 4, 10℃/hr의 냉각속도에 의존하였다. 얻어진 에메랄드 단결정을 동정하였고, 그 결과는 다음과 같다. 즉, 결정계 ;육방정계, 격자상수 ; a=0.921nm, c=0.917nm, 결정의 크기 ; 최대 0.80×0.95mm²(c×m), 방위 ; c(1000), m(1010).

Growth of synthetic emerald〔((BeO)₃(Al_2-xCr_xO₃)(SiO₂)₆〕single crystals was carried out by flux method. In this study, the starting materials were prepared by stoichiometric mixing of BeO, Al₂O₃ and SiO₂ as reaching components. The conditions for the growth of synthetic emerald single crystals are as follows : temperature range ; 1150∼900℃, cooling rate ; 2, 4, 10℃/hr, flux ; Li₂CO₃, V₂O₅, dopant ; Cr₂O₃. The sizes of Cr₂O₃ emerald single crystals depending on 2, 4, 10℃/hr cooling rates. The obtained emerald single crystal was characterized and the following results were obtained : lattice parameter : a=0.921nm, c=0.917nm, crystal system ; hexagonal, crystal size ; max.0.80 × 0.95mm²(c×m), orientation ; (1000), m(1010).

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[2] Goodwin FE, J. Appl. Phys., 32, 1624 (1961)

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[4] Nacken R, Chem. Z., 74, 50 (1950)

[5] Linares RC, Am. Mineralogist, 52, 1554 (1967)

[6] Nassau K, J. Cryst. Growth, 35, 211 (1976)

[7] Inoue M, Morishita T, Narita E, Okabe T, 일화, 11, 1489 (1979)

[8] Espig H, Chem. Tech., 12, 327 (1960)

[9] Flanigen EM, Breck DW, Mumgach NR, Taylor AM, Am. Mineralogist, 52, 744 (1967)

[10] Lefever RA, Chase AB, Shbon LE, Am. Mineralogist, 47, 1450 (1962)

[11] Ushio M, 일화, 55(9), 1648 (1972)

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[13] Wood DL, Nassau K, J. Chem. Phys., 47, 2220 (1967)

[14] Pamplin BR, "Crystal Growth," 2nd Ed., Vol. 16, 467-70 (1975)

[15] 김수진, "광물학 원론," 2nd ed., Chap. 8, 우성출판사 (1985)

[16] Ganguli D, Saha P, Trans. Indian Ceram. Soc., 24, 144 (1965)

[17] Sakamoto C, Fujii S, Sugie Y, Hanamoto T, Yogyo-Kyogai-Shi, 93(11), 732 (1985)

[18] Plyusnina II, Geochem., 13 (1964)

[19] Plyusnina II, Geochem., 174 (1963)

[20] Saksena BD, Trans. Faraday Soc., 57, 242 (1961)

[21] Pfund AH, J. Opt. Soc. Am., 35, 611 (1945)