摘要
选取腾冲市场上常见的缅甸琥珀品种为研究对象,对其常规宝石学特征、包裹体特征以及红外光谱特征进行测试分析。结果显示,缅甸琥珀样品在偏光显微镜下出现异常消光现象,大多数缅甸琥珀相对密度在1.020～1.050,植物珀、血珀、翳珀的相对密度偏大,分别为1.064、1.084、1.109;缅甸琥珀样品在紫外线长波下普遍发强蓝白色或蓝紫色荧光,在短波下发弱荧光或不发光,其中红茶珀品种在紫外线长波下发强紫粉色荧光,血珀和翳珀品种发弱土黄色荧光;缅甸琥珀样品中包裹体的种类繁多,流纹、裂隙、气相和气液两相包裹体、点状包裹体等普遍存在,面纱状流纹包裹体具有产地鉴定意义。红外光谱测试结果显示,缅甸琥珀具有产地鉴别意义的特征吸收峰在1 300～1 000cm^(-1),该范围内存在4个主要吸收峰,其中1 142cm^(-1)附近峰的强度最大,1 224cm^(-1)附近次之,1 090和1 031cm^(-1)附近的吸收强度较弱。
In this p ap e r, common ambers from Myanmar in Tengchong m a rk e t Yunnan Prov-ince were chosen as the research objects. The gemmological characterist ics inclusion fea-tures and infrared spectra of ambers from Myanmar were tested and analyzed. The results showed that amber samples from Myanmar appeared the phenomena of anomalous extinction under the polariscope, and the specific gravity ranges from 1. 020 to 1. 050. However , the specific gravity of plant am b e r, blood amber and black amber is respectively 1. 064 , 1. 084 , 1. 109 , significantly larger than th a t of the other types. Most of amber samples from Myan-mar generally release strong blue or blue purple fluorescence under long wave ultraviolet light, and weak fluorescence or none fluorescence under short wave ultraviolet light. Where-as under long wave ultraviolet l ig h t black tea amber shows purple pink fluorescence and blood amber and black amber show khaki fluorescence. A wide range of inclusions existed in ambers from Myanmar, such as cracks, rhyo tax i t ic, gas-liquid two-phase inclusions. And the rhyotaxitic inclusions in ambers from Myanmar have a signification effect in identification of origin. The infrared spectrum te s t results demonstrate th a t the characteristic absorptionpeaks in infrared spectra of ambers from Myanmar are four main absorption peaks within 1 300？1 000 cm-1. The intensity of absorption peak at 1 142 cm-1,is the largest o n e, and the peak at 1 224 cm-1 is the sccond largest o n e, and the intensity of absorption peak at1 090 cm-1 and 1 031 cm-1 are weak.
出处
《宝石和宝石学杂志》
CAS
2017年第5期48-59,共12页
Journal of Gems & Gemmology
基金
中国地质大学(武汉)珠宝检测技术创新中心开放基金CIGTXM-S201612
文章编号CIGTWZ-2017010
关键词
號珀
品种
内含物
红外光谱
缅甸
amb e r
ty p e
inclusion
infrared spectrum
Myanmar
