4.0～5.5GPa压力下硬玉翡翠的合成与表征
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摘要
模拟天然硬玉成矿原理,采用优化的合成工艺,以硅酸铝和硅酸钠为原料制备出玻璃料,在高温高压下将非晶质的硬玉成分粉末转化为晶态硬玉。合成硬玉质地温润细腻、色泽均匀,具有高档硬玉的品质。XRD和SEM分析结果表明合成样品结晶矿物为硬玉(NaAlSi_2O_6),且结晶程度较好,晶粒细密,具有与天然硬玉相似的柱状纤维编织结构。在4.0~5.5 GPa压力条件下研究发现,随着压力的增加,硬玉合成温度随之增加;温度对合成硬玉晶粒的成长和编织情况有很大的影响;利用FTIR检测合成硬玉,其红外特征峰与天然硬玉一致,表明其分子结构为硅氧四面体结构;检测合成硬玉的硬度和密度等常规宝玉石参数与天然硬玉接近。
Using Al_2(SiO_3)_3and Na_2SiO_3·9H_2O as raw materials,jadeite were successfully achieved from its glass phase under high pressure and high temperature( HPHT) by simulating the mineralization principle of natural jadeite. The synthetic jadeite samples exhibit highly saturated colors and smooth finish with a greasy feel and luster that are features of high quality jadeite. X-ray diffraction and scanning electron micrographs results show that the jadeite samples were all well-crystallize,exhibiting a good texture with vitreous luster and appearance exactly like that of natural jadeite. The result shows that temperature have great influence on the grain growth and weaving conditions of synthetic jadeite under the condition of 4. 0-5. 5 GPa. The infrared characteristic peaks are consistent with natural jadeite by FTIR test. It was shown that the synthetic jadeites have the molecular structure of silicon oxygen tetrahedron structure.
Using Al_2(SiO_3)_3and Na_2SiO_3·9H_2O as raw materials,jadeite were successfully achieved from its glass phase under high pressure and high temperature( HPHT) by simulating the mineralization principle of natural jadeite. The synthetic jadeite samples exhibit highly saturated colors and smooth finish with a greasy feel and luster that are features of high quality jadeite. X-ray diffraction and scanning electron micrographs results show that the jadeite samples were all well-crystallize,exhibiting a good texture with vitreous luster and appearance exactly like that of natural jadeite. The result shows that temperature have great influence on the grain growth and weaving conditions of synthetic jadeite under the condition of 4. 0-5. 5 GPa. The infrared characteristic peaks are consistent with natural jadeite by FTIR test. It was shown that the synthetic jadeites have the molecular structure of silicon oxygen tetrahedron structure.
引文
[1]李新英,刘晓亮.高温高压人工合成翡翠研究[J].新疆有色金属,2010,(S1):81-84.
[2]欧阳秋眉.翡翠的矿物组成[J].宝石和宝石学杂志,1999,(1):18-23.
[3]赵明开.硬玉及相关辉石化学成份与翡翠玉种研究[J].云南地质,2002,21(2):159-174.
[4]施加辛.翡翠的概念、分类及A、B、C货鉴定有关问题的讨论[J].云南地质,1998,17(3-4):245-250.
[5]王海云.关于翡翠次生色的研究[D].北京:中国地质大学,2003.
[6]高媛.翡翠显微构造特征及其对品质的影响[D].成都:成都理工大学,2006.
[7]Prewitt C T.The Crystal Structure of Jadeite,Na AISi2O6[J].The American Mineralogist,1966,51:956-957.
[8]M J,Prewitt C T.The Crystal Structures of Yollastonite and Pectolite[J].Proc.Nat.Acad.Sci.,1961,47:1883-1888.
[9]Charles W.Refinement of the Crystal Structure of Kyanite[J].Zeit.Krist.,2007,118:337-360.
[10]Charles W.Temperature Parameter of Silicate Crystal Structures[J].Am.Mineral,1990,50:282.
[11]Maryellen Cameron,Shigeho Sueno.High-Temperature Crystal Chemistry of Acmite,Diopside,Hedenbergite,Jadeite,Spodumene[J].American Mineralogist,1973,58:594-618.
[12]Badcer R M.The Relationship between the Internuclear Distances and Force Constants of Molecules and Its Application to Polyatomic Molecules[J].J.Chem.Phys.,1935,3(11):710-714.
[13]Tong Yinhonh,Yuan Kuirong.Study of Texture of Jadeite Jade[J].Guilin Institute of Technology,1997,7(1):55.
[2]欧阳秋眉.翡翠的矿物组成[J].宝石和宝石学杂志,1999,(1):18-23.
[3]赵明开.硬玉及相关辉石化学成份与翡翠玉种研究[J].云南地质,2002,21(2):159-174.
[4]施加辛.翡翠的概念、分类及A、B、C货鉴定有关问题的讨论[J].云南地质,1998,17(3-4):245-250.
[5]王海云.关于翡翠次生色的研究[D].北京:中国地质大学,2003.
[6]高媛.翡翠显微构造特征及其对品质的影响[D].成都:成都理工大学,2006.
[7]Prewitt C T.The Crystal Structure of Jadeite,Na AISi2O6[J].The American Mineralogist,1966,51:956-957.
[8]M J,Prewitt C T.The Crystal Structures of Yollastonite and Pectolite[J].Proc.Nat.Acad.Sci.,1961,47:1883-1888.
[9]Charles W.Refinement of the Crystal Structure of Kyanite[J].Zeit.Krist.,2007,118:337-360.
[10]Charles W.Temperature Parameter of Silicate Crystal Structures[J].Am.Mineral,1990,50:282.
[11]Maryellen Cameron,Shigeho Sueno.High-Temperature Crystal Chemistry of Acmite,Diopside,Hedenbergite,Jadeite,Spodumene[J].American Mineralogist,1973,58:594-618.
[12]Badcer R M.The Relationship between the Internuclear Distances and Force Constants of Molecules and Its Application to Polyatomic Molecules[J].J.Chem.Phys.,1935,3(11):710-714.
[13]Tong Yinhonh,Yuan Kuirong.Study of Texture of Jadeite Jade[J].Guilin Institute of Technology,1997,7(1):55.