CAJ | 학술논문

缅甸翡翠是以硬玉为主要矿物的多晶集合体，硬玉的晶体化学成分可以用NaAlSi2 O6来表示，天然产出的硬玉常常存在类质同象替代，Na被Ca替代，Al被Mg ，Fe ，Cr等元素替代，形成不同的翡翠类型，使得翡翠的化学成分变得更加复杂，而且其物理性质也产生变化，这种变化包括颜色、透明度、折射率、比重、结晶程度以及红外吸收光谱的特征。探索了翡翠的化学成分对其红外光谱的影响及规律，使用傅里叶红外光谱仪（Fourier transform infrared spectroscopy ，FTIR）对10个含不同化学成分的缅甸翡翠样品进行漫反射法测量，分析结果表明，翡翠的红外吸收峰的位置随着样品的Na／Na＋Ca的摩尔比例增加而向高波数发生位移；在低波数区域，在424，576和658 cm －1附近的吸收峰位的波数与Na／Na＋Ca比值存在很好的线性相关，相关系数依次为R21＝0.9442，R22＝0.9283，R23＝0.9097。采用红外光谱测试技术结合所建立的线性模型可以推断未知翡翠样品的Na／Na＋Ca的摩尔比例，当翡翠样品的Na／Na＋Ca比值等于0.8时，红外吸收峰应该在658.7，574.5，422.5 cm －1处；如果翡翠样品的红外吸收峰波数＜658.7，＜574.5 cm －1，＜422.5 cm－1，则翡翠样品的Na／Na＋Ca比值小于0.8，为绿辉石质翡翠；如果翡翠样品的红外吸收峰波数＞658.7，＞574.5，＞422.5 cm －1，则翡翠样品的Na／Na＋Ca比值大于0.8，为硬玉质翡翠。该工作为红外光谱技术测量翡翠样品，分析翡翠化学成分，确定翡翠矿物种属提供了一种快捷、省时、方便的无损测量分析方法。
면전비취시이경옥위주요광물적다정집합체，경옥적정체화학성분가이용NaAlSi2 O6래표시，천연산출적경옥상상존재류질동상체대，Na피Ca체대，Al피Mg ，Fe ，Cr등원소체대，형성불동적비취류형，사득비취적화학성분변득경가복잡，이차기물이성질야산생변화，저충변화포괄안색、투명도、절사솔、비중、결정정도이급홍외흡수광보적특정。탐색료비취적화학성분대기홍외광보적영향급규률，사용부리협홍외광보의（Fourier transform infrared spectroscopy ，FTIR）대10개함불동화학성분적면전비취양품진행만반사법측량，분석결과표명，비취적홍외흡수봉적위치수착양품적Na／Na＋Ca적마이비례증가이향고파수발생위이；재저파수구역，재424，576화658 cm －1부근적흡수봉위적파수여Na／Na＋Ca비치존재흔호적선성상관，상관계수의차위R21＝0.9442，R22＝0.9283，R23＝0.9097。채용홍외광보측시기술결합소건립적선성모형가이추단미지비취양품적Na／Na＋Ca적마이비례，당비취양품적Na／Na＋Ca비치등우0.8시，홍외흡수봉응해재658.7，574.5，422.5 cm －1처；여과비취양품적홍외흡수봉파수＜658.7，＜574.5 cm －1，＜422.5 cm－1，칙비취양품적Na／Na＋Ca비치소우0.8，위록휘석질비취；여과비취양품적홍외흡수봉파수＞658.7，＞574.5，＞422.5 cm －1，칙비취양품적Na／Na＋Ca비치대우0.8，위경옥질비취。해공작위홍외광보기술측량비취양품，분석비취화학성분，학정비취광물충속제공료일충쾌첩、성시、방편적무손측량분석방법。
Myanmar jade is crystalline aggregate with the major mineral of jadeite .Jadeite can be represented by the crystal‐chemical formula NaAlSi2 O6 .Isomorphous substitution occurs in the natural jadeite frequently ,with replacement of Na by Ca , and replacement of Al by Mg ,Fe ,Cr etcetera ,which makes the component of Myanmar jade much more complex and leads to the variation of its physical features ,including color ,transparency ,refractive index ,specific gravity and infrared spectrum char‐acteristics ,forming different types of Myanmar jade .The studies show that the vibrational spectra characteristics of the Myan‐mar jade varies depending on the substitution of different elements .In this work ,we studied the impacts of the variation of My‐anmar jade component on its infrared spectroscopy .10 Myanmar jade samples which consisted of different chemical composition were measured using Fourier Transform Infrared Spectroscopy (FTIR) ,and results show that the IR absorption peaks shift to higher wave numbers ,as the atomic ratio of Na/Na+ Ca of the samples increases .In the low wave number region ,the wave number of the IR absorption peaks at 424 ,576 and 658 cm-1 and the atomic ratio of Na/Na+Ca of the samples share fine linear correlation ,and the correlation coefficients (R2 ) are ,in order ,R21 =0.944 2 ,R22 =0.928 3 ,R23 =0.909 7 .We can utilize infra‐red spectrum technologies combined with linear model built by us in this work to predicate the atomic ratio of Na /Na+Ca of the unknown Myanmar jade samples .As the atomic ratio of Na/Na+Ca of the unknown Myanmar jade samples equals 0.8 ,the IR absorption peaks should be at 658.7 ,574.5 ,422.5 cm -1 .If the wavenumbers of the IR absorption peaks are less than 658.7 , 574.5 and 422.5 cm-1 ,the atomic ratio of Na/Na+Ca of the unknown Myanmar jade samples is less than 0.8 ,which is indica‐ting that the unknown Myanmar jade sample isomphacitic jade ,while the wavenumbers of the IR absorption peaks are more than 658.7 ,574.5 and 422.5 cm-1 ,the atomic ratio of Na/Na+Ca of the unknown Myanmar jade samples is more than 0.8 ,which is indicating that the unknown Myanmar jade sample is jadeitic jade .The studies of this work offer a super‐quick time‐saving and labor‐saving nondestructivetesting method for using infrared spectrum technologies to test Myanmar jade samples ,analyze their component and predicate which mineral styles the unknown samples are .