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宝石和宝石学杂志（中英文） 2024年第2期26卷 48-55页

作者： Ting Fang Jifu Liu Mingxing Yang gemmological Institute China University of GeosciencesWuhan 430074China Hubei Key research Base of Humanities and Social Sciences--Center for Jewelry Heritage and Innovation Wuhan 430074China

Jade ware Jue is one of the most fashionable ornament in ancient China from the Neolithic Age to the Han *** this study,the remnants of jade ware Jue,from Lijiashan ancient tomb group have been tested and analyzed *** samples through a light etch surface showing glass luster and those with a severe etch surface showing earthen *** the aid of X-ray fluorescence Spectrometer(X-ray Fluorescence)test and X-ray diffraction(XRD)detection,the results show that tremolite is not the main mineral of the *** main components of the tested samples with light erosion are antigorite and talc,although the main components of the samples with severe erosion are calcite containing calcium carbonate ***,the research on jade ware Jue in Yunnan culture has not only contributed to our further understanding of the jade objects from Yunnan culture and the variety of jade material located in the Yunnan *** also provides a basis for the trace of the history and culture through the distribution and evolution of burial hierarchy *** the same time,the microscopic observation of the tested samples manifested a residual trace of“string”at the perforation,which has played a critical role in restoring the wearing of jade ware Jue from the tombs of the ancient Yunnan State and the handicraft skills at that time.

关键词： Dian culture jade Jue corroded ancient jade XRD erosion mechanism Yunnan,China

The Spectral Characterization of Blue Spinel and Other Blue Gemstones with the Alexandrite Effect

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宝石和宝石学杂志（中英文） 2024年第4期26卷 69-76页

作者： Jiling Zhou Chengsi Wang Xishan Zhao Yunqi Yang Andy Hsitien Shen gemmological Institute China University of GeosciencesWuhan 430074China Hubei Gems and Jewelry Engineering Technology research Center Wuhan 430074China Shenzhen research Institute of China University of Geosciences Shenzhen 518000China Guangzhou CUG Gems and Jewelry Testing Co. Ltd.Guangzhou 510000China

In gemmology,the term“Alexandrite effect”is used to describe colour change phenomenon when a gemstone is observed under different light sources,usually between daylight and incandescent *** definition of the Alexandrite effect is constantly being broadened with new discovery of gem *** traditional definition of the Alexandrite effect attributing the colour change phenomenon to the presence of two maximum transmission regions and a maximum absorption region in the absorption *** this study,7 blue spinels and 5 blue gemstones(including tanzanite,kyanite,fluorite,and 2 sapphires)showing the Alexandrite effect were *** goal is to explain the cause of blue-to-violet Alexandrite effect and the spectral features causing such colour *** the UV-Vis spectra,all samples showed a maximum absorption peak in the range of 534-610 nm,within the green region to orange *** traditional explanation of green to red Alexandrite effect required a transmission window in the red region;however,some of our samples did not show this transmission window and the blue-to-violet Alexandrite effect was still ***,it is incomplete to explain the mechanism of the Alexandrite effect according to their characteristic absorption spectra,a systematic study based on modern colour science and colour perception in human vision is required to elucidate the blue-to-violet Alexandrite effect.

关键词： blue spinel Alexandrite effect absorption spectrum

具有高温度敏感常数B值的超高灵敏金刚石薄膜负温度系数热敏电阻器件（英文）

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Science China Materials 2024年第10期67卷 3321-3329页

作者：陈巧赵艺梦李佳炜刘惜缘王欣悦张文曦朱宏伟 gemmological Institute China University of Geosciences Shenzhen research Institute China University of Geosciences State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua University Southwest United Graduate School

基于负温度系数（NTC）热敏电阻的精准温度信息监测在现代科学研究及工程应用领域中至关重要.尽管目前NTC材料的敏感性能已取得显著提高,但在较宽的探测温度范围内保持高灵敏度和良好的线性度仍然面临巨大挑战.本文报道了一种具备超高... 详细信息

基于负温度系数（NTC）热敏电阻的精准温度信息监测在现代科学研究及工程应用领域中至关重要.尽管目前NTC材料的敏感性能已取得显著提高,但在较宽的探测温度范围内保持高灵敏度和良好的线性度仍然面临巨大挑战.本文报道了一种具备超高灵敏度、超快响应速度和较宽温域探测能力的金刚石热敏电阻器件,在室温（30℃）至300℃的工作温度范围内,展现出极高的温度敏感常数B值(B30/300),高达8012 K.其灵敏度明显超过现有报道的同温区NTC热敏电阻.此外,金刚石优异的热导率和化学稳定性显著提高了其热敏电阻器件的响应速度和耐久性,相较于传统热敏材料具备显著的应用优势.通过表征分析发现,金刚石热敏电阻的超高灵敏度与晶界杂质元素密切相关.结合变温阻抗谱分析和霍尔效应测试,推测其热敏导电机制主要基于C-H/C-N偶极子的跳跃导电.本研究在金刚石NTC热敏技术方面所取得的进展,将为推动新型金刚石温度敏感电子器件的应用及发展提供了有力支持.

关键词： polycrystalline diamond thermistors negative temperature coefficient hopping conduction grain boundary

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research on the Application of Contemporary Wireless Enamel Technique in the Teaching of Traditional Jewelry Craft Course for College Student

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宝石和宝石学杂志（中英文） 2024年第4期26卷 86-93页

作者： Zhengxu Yan Xiao Lu Toshie Miyakawa Rui Bao gemmological Institute China University of GeosciencesWuhan 430074China Hubei Key research Base of Humanities and Socical Sciences—Center for Jewelry Heritage and Innovation Wuhan 430074China Japan Kougei Nikkoukai Institute Tokyo 110-0016Japan

Taking the wireless enamel(wireless enamel refers to make enamel works without filigree)production technique in jewelry practice course as the research object,combined with years of enamel teaching experience in the gemmological Institute of China University of Geosciences(Wuhan),this study expounds the theoretical class,design preparation,creative idea and technique practice application from the course teaching objectives and the implementation,which also emphasizes the practical improvability of students’design practice ability and innovative thinking *** the period,it focuses on the core processes,such as wireless enamel glaze method,object correction,firing time,composite application and system integration,to help students solve the key and difficult problems in the wireless enamel firing process.

关键词： wireless enamel technique practical teaching

In Situ Resonance Raman Spectra of Organic Pigments in Momo Coral

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Journal of China University of Geosciences 2008年第2期19卷 146-151页

作者：范陆薇杨明星 gemmological Institute China University of Geosciences

In this study, Raman scattering measurements were obtained for momo corals covering their typical range of colors. Three different excitation wavelengths （785, 633, 514 nm） are used for the same samples at the same points. All the samples show the two major Raman features of polyenic compounds assigned to double carbon-carbon （C=C） stretching vibration at approximately 1 500 cm^-1 and single carbon-carbon （C-C） stretching vibration at approximately 1 130 cm^-1 bond stretching mode. These peaks are not detected in the corresponding white parts of momo corals. However, some changes in intensities, shape, and position of C=C stretching vibrations of the same point are observed by using different excitation wavelengths. The exact position of C-C stretching vibration of polyenic molecules depends strongly on the number of double bonds contained in their polyenic chain. In addition, the number of double bonds contained in the polyenic chains shows that different colors of the red momo coral are caused by different mixtures of polyenic compounds.

关键词： Raman spectrum momo coral polyenic molecules.

Mid-Infrared Reflectance and Ultraviolet-Visible Spectroscopy of Demantoid from Kerman Province, Iran

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宝石和宝石学杂志 2018年第S1期20卷 143-144页

作者： Bahareh Shirdam Soheila Aslani gemmological research laboratory School of Mining EngineeringCollege of EngineeringUniversity of Tehran

Mid-infrared(mid-IR)spectroscopy of 15 demantoid samples from Bagh-eBorj,Esfandagheh district,Kerman Province,Iran,has been studied and their mid-IR and Ultraviolet-Visible(UV-Vis)were *** samples has been collected from serpentinites of Esfandahge's Chromium Bearing Ophiolititic complex in Sanandaj-Sirjan Structural Zone,southern ***-Vis spectroscopy is a suitable method for detection of transition ions responsible for mineral's colour such as *** UV-Vis spectra of demantoid samples with a colour range of yellowish green to green were slightly different,representing peaks at 392,437,573 and 865 nm related to and 437 and 481 nm bands attributed *** the 855 nm band's absorbance changed moderately by the tolerance of Cr content which correlated the green ***-IR spectroscopy identifies the hydroxyl ***-IR spectra of all samples presented close results in the 3 800-3 400 cm^(-1) region but differences could be observed in the 1 500-800 cm^(-1) *** two absorption peaks at 3 550 cm^(-1) and 3 596 cm^(-1) are related to hydroxide,which can be present in andradite as a minor component,in the form of structurally bonded OH-.It is needed to be mentioned that from 15 studied sample,6 samples contained"horsetail"inclusions,which confirms their serpentinite geologic origin.

关键词： demantoid IR UV-Vis origin

SHRIMP Age of Exotic Zircons in the Mengyin Kimberlite,Shandong,and Their Formation

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Acta Geologica Sinica(English Edition) 2005年第5期79卷 654-661页

作者： YIN Zuowei LU Fengxiang CHEN Meihua gemmological Institute China University of Geosciences Wuhan Hubei 430074 Earth Science Department China University of Geosciences Wuhan Hubei 430074

Due to various courses of formation of zircons from kimbedites, different kinds of zircons can provide useful information about the mantle and the crystallization of kimberlites. We chose 9 typical ones out of 33 zircons from the Shengli- 1 kimberlite pipe in Mengyin County, Shandong Province to study their ages and formation by means of SHRIMP, CL, Raman spectroscopy, etc. The result shows that the ^207Pb/^206Pb ages of many zircons vary from 2567±13 Ma to 2636±42 Ma, which are close to the age of Archaean granitoid （2457.3±47 Ma） in the study area. The contents of U and Th in the samples are higher than those of zircons crystallized in kimbedite and vary from 89 to 398 ppm as well as from 10 to 283 ppm. Color zones are obvious in these samples under the CL. The inclusions are composed of feldspar, quartz, apatite, etc. The above results show that the zircon samples came from the crust of the earth, which means that the kimberlite magmas are contaminated by crustal substances. The position where a great deal of volatile escapes and even explodes during rapid rise of magmas is located at the boundary of the ancient basement and the Precambrian stratum.

关键词： kimberlite exotic zircons ages SHRIMP contamination Shandong

Magma Generation of Magnetite-Rich Intermediate-Mafic Rocks and Its Mantle Processes in the Southwestern Alxa Block,NW China

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Journal of Earth Science 2022年第1期33卷 161-176页

作者： Lu Tao Hongfei Zhang Jing Wu Xiaochun Zhou Liqi Zhang State Key laboratory of Geological Processes and Mineral Resources China University of GeosciencesWuhan 430074China School of Earth Sciences China University of GeosciencesWuhan 430074China gemmological Institute China University of GeosciencesWuhan 430074China Faculty of Earth Resources China University of GeosciencesWuhan 430074China

Many studies focus on mineralization of huge magnetite ore deposits and petrogenesis of their large-volume host ***,magma generation of those small-scale intrusions with enrichment of magnetite is poorly reported and paid attention *** here carry out an integrated study of magnetite chemistry,U-Pb zircon dating,geochemistry,and Sr-Nd-Hf isotopes for the magnetite-rich intermediate-mafic rocks from the Helishan pluton in the southwestern Alxa Block,Northwest ***,together with several previously reported magnetite/iron-rich intrusions nearby,is capable of providing some constraints on magma generation of magnetite/iron-rich intrusive *** Helishan pluton,dated at ca.290 Ma,consists of hornblende gabbro,diorite,and quartz monzodiorite with~3%-5%magnetite in all the *** on magnetite chemistry manifests a magmatic origin for *** the lithologies display high TFeO/MgO ratio (1.71-1.89),weakly fractionated REE patterns((La/Yb)_(N)=1.82-10.17),enrichment of Rb,Sr,and Pb,and depletion of high field strength *** have (^(87)Sr/^(86)Sr)_(i) values of 0.705 2 to 0.705 8,ε_(Nd)(t) values of+0.03 to+0.64,and zircon ε_(Hf)(t) values of +6.5 to+*** propose that they were derived from partial melting of iron-rich metasomatized lithospheric *** systematic variations of Sr/Y ratios and Nd-Hf isotopic compositions with time for the Paleozoic igneous rocks at the southwestern Alxa Block indicate ever existence of thinning and rebirth of lithospheric *** geodynamic process could be the potential mechanism to give rise to the iron-rich signature of the reborn mantle sources of the Helishan *** intermediatemafic intrusions at subduction zones,they are unlikely to form considerable magnetite ore deposits since their modest magmatic flux and early fractional crystallization of magnetite at a high oxygen fugacity and H_(2)O condition.

关键词： geochemishtry magnetite-rich intrusion mantle source petrogenesis lithospheric process Alxa Block Northwest China

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三枚东南亚“椰子珍珠”特征（英文）

宝石和宝石学杂志 2019年第3期21卷 42-47页

作者： Henry A.H?nni Chiara Parenzan SSEF Swiss gemmological Institute

我们对从一个私人收藏家处借到的三枚所谓的"椰子珍珠"进行了研究分析。白色圆形的"椰子珍珠"表面具有奇特的平行沟槽结构,一侧有一个或三个小凸起。拉曼光谱学测试、密度测试和盐酸试验显示出样品本身是由多晶文石组成,显示平行的层状... 详细信息

我们对从一个私人收藏家处借到的三枚所谓的"椰子珍珠"进行了研究分析。白色圆形的"椰子珍珠"表面具有奇特的平行沟槽结构,一侧有一个或三个小凸起。拉曼光谱学测试、密度测试和盐酸试验显示出样品本身是由多晶文石组成,显示平行的层状结构,与壳类材料一致。表面凹槽锉削痕迹清晰可见,表明这些"珍珠"是手工打磨成型的。根据制作这些样品的贝壳的厚度,以及在砗磲中观察到的类似结构,推测该样品是用巨大的蚌壳制作的,没有迹象表明这些"珍珠"是从椰子相关的原料中获得的。

关键词：椰子珍珠珍珠砗碟东南亚

Room-Temperature Phosphorescence and Lifetime of Fossil Resins (Amber) from Dominican Republic, Mexico, Baltic Sea, Myanmar, and Fushun, China

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宝石和宝石学杂志（中英文） 2023年第4期25卷 111-119页

作者： Zhiqing Zhang Yamei Wang Andy H.Shen College of Natural Resources and Geographic Information HuBei Land Resources Vocational CollegeWuhan 430090China gemmological Institute China University of GeosciencesWuhan 430074China

Amber can emit room temperature phosphorescence(RTP)under the well-known 365 nm fluorescence ultraviolet *** paper is devoted to the phosphorescence study of 20 pieces of amber materials from the Dominican Republic,Mexico,Baltic sea,Myanmar,and Fushun,*** results show that amber from the same geographic origin has similar shape in phosphorescence ***,the shape of the amber phosphorescence spectra varies depending on their different ***(amber from Myanmar)and Fushun amber have a bright yellow phosphorescence with a long lifetime,while the Dominican and Mexican ones are weaker and last *** irradiation of Baltic amber becomes faint or even *** spectral Gaussian fitting results suggest an emission maximum near 550 nm in most amber *** phosphorescence lifetime,analyzed through the exponential function fitting,is up to 1 second in Burmite and Fushun samples,shorter in the Dominican and Mexican ones,about 0.230 s,and the shortest in Baltic amber,close to 0.151 *** variations of phosphorescence lifetime and intensity are related to the relative geological ages of these *** indicated that the phosphorescence agent was probably formed during the long geological *** the anomaly occurred in Baltic amber,the only one found in a sea secondary deposit form,it demonstrated that the terrestrial geological environment these amber preserved has prevented the phosphorescence agent to be deactivated.

关键词： ossil resin amber room-temperature phosphorescence(RTP) phosphorescence lifetime