Gemmological and Mineralogical Characteristics and Genesis of “Dengguangdong” in Qingtian Stone
-
摘要: 采用X射线粉末衍射和电子顺磁共振等方法,对青田石中的珍贵品种“灯光冻”样品进行了研究。结果表明,“灯光冻”样品的矿物组成为叶蜡石,多型特征为2M型,含极少量的1TC型;其结构有序度高,化学成分表现为贫Al、富Si型,边缘部位具有石英化迹象。“灯光冻”样品中的Fe3+呈八面体占位,与Ti4+,Si-O--Al空穴心共同致色。“灯光冻”样品中的叶蜡石晶体呈不规则叶片状,大小较均一,呈弯曲片状集合体结构。Abstract: The "Dengguangdong" samples,a precious variety of Qingtian stone,are studied by using the X-ray powder diffraction(XRD) and electron paramagnanetic resonance(EPR) methods.The results show that the mineral component of the "Dengguangdong" samples is pyrophyllite.Its polymorphism is 2M,but containing rare 1TC,with a high degree-order structure and poor aluminum and rich silicon of the chemical composition.The edge of the sample is quartzification.Fe3+ in the "Dengguangdong" samples is located in octahedron interstice.The "Dengguangdong" sample is colourated by Fe3+,Ti4+ and hole center of Si-O--Al.The pyrophyllite crystal in the sample is irregular bladed,uniform size and curved-platy aggregate structure.
-
Keywords:
- "Dengguangdong" /
- Qingtian stone /
- pyrophyllite /
- EPR
-
-
[1] 陈慕榕.中国青田石——名石.名雕.名家[M].杭州:浙江人民出版社,1996.74. [2] 李文瑛.我国几个矿区叶蜡石X粉晶衍射研究[J].矿物学报,1989,9(4):378-382. [3] 杨泰铭,林达,林强.福建省峨嵋叶蜡石矿的主要矿石类型及叶蜡石的多型特征[J].福建地质,1991,1(1):16-21. [4] 朱选民,亓利剑.浙江青田石的矿物学特征及成玉机理[J].浙江国土资源,2002,1(10):50-53. [5] 朱选民,亓利剑,蒋红旗,等.浙江青田叶蜡石型蓝刚玉的宝石学特征及成因初探[J].宝石和宝石学杂志,2001,3(4):15-19. [6] 朱选民.浙江青田石的矿物成分和成玉机理研究[J].岩石矿物学杂志,2003,22(1):65-70. [7] 文化川,汪灵.浙江省青田县山口叶蜡石矿控矿地质因素及矿床成因初步探讨[A].第三届全国矿床会议论文集[C].成都:四川建筑材料工业学院,1982.15. [8] 王濮,潘兆橹,翁玲宝.系统矿物学(中册)[M].北京:地质出版社,1982.402. [9] 蔡秀成,张惠芬,富疏德,等.天然叶蜡石及其热处理产物的电子顺磁共振(EPR)研究[J].矿物学报,1990,10(1):15-22. [10] 范良明,杨永富.浙江青田石及其颜色成因研究[J].硅酸盐通报,1985,(5):32-43. [11] 任磊夫.田黄宝石的矿物学研究[J].岩石矿物学杂志,1988,7(2):151-157. [12] 黄凤鸣,古清慧,邹严寒.翡翠的成分和结构特征及其与种或地的关系[J].宝石和宝石学杂志,2000,2(1):7-14. [13] 张蓓莉.系统宝石学[M].北京:地质出版社,2006.69.
计量
- 文章访问数: 100
- HTML全文浏览量: 8
- PDF下载量: 18