首页> 外文期刊>Minerals >Tiberiobardiite, Cu 9 Al(SiO 3 OH) 2 (OH) 12 (H 2 O) 6 (SO 4 ) 1.5 ·10H 2 O, a New Mineral Related to Chalcophyllite from the Cretaio Cu Prospect, Massa Marittima, Grosseto (Tuscany, Italy): Occurrence and Crystal Structure
【24h】

Tiberiobardiite, Cu 9 Al(SiO 3 OH) 2 (OH) 12 (H 2 O) 6 (SO 4 ) 1.5 ·10H 2 O, a New Mineral Related to Chalcophyllite from the Cretaio Cu Prospect, Massa Marittima, Grosseto (Tuscany, Italy): Occurrence and Crystal Structure

机译:泰伯iobardiite,Cu 9 Al(SiO 3 OH)2(OH)12(H 2 O)6(SO 4)1.5·10H 2 O,一种新的与叶蜡石相关的矿物,来自Cretaio Cu矿区,马萨马里蒂玛,格罗塞托(托斯卡纳意大利):发生和晶体结构

获取原文
           

摘要

The new mineral species tiberiobardiite, ideally Cu 9 Al(SiO 3 OH) 2 (OH) 12 (H 2 O) 6 (SO 4 ) 1.5 ·10H 2 O, has been discovered in the Cretaio Cu prospect, Massa Marittima, Grosseto, Tuscany, Italy, as very rare, light green, vitreous, tabular {0001}, pseudo-hexagonal crystals, up to 200 μm in size and 5 μm in thickness, associated with brochantite. Electron microprobe analysis gave (in wt %, average of 5 spot analyses): SO 3 10.37, P 2 O 5 3.41, As 2 O 5 0.05, SiO 2 8.13, Al 2 O 3 5.54, Fe 2 O 3 0.74, CuO 62.05, and ZnO 0.03, for a total of 90.32. Based on an idealized O content of 42 atoms per formula unit, assuming the presence of 16 H 2 O groups and 13.5 cations (without H), the empirical formula of tiberiobardiite is (Cu 8.69 Al 0.21 Fe 0.10 ) Σ9.00 Al 1.00 (Si 1.51 P 0.54 ) Σ2.05 S 1.44 O 12.53 (OH) 13.47 ·16H 2 O. The main diffraction lines, corresponding to multiple hkl indices, are [ d in ? (relative visual intensity)]: 9.4 (s), 4.67 (s), 2.576 (m), 2.330 (m), and 2.041 (mw). The crystal structure study revealed tiberiobardiite to be trigonal, space group R 3 ˉ , with unit-cell parameters a = 10.6860(4), c = 28.3239(10) ?, V = 2801.0(2) ? 3 , and Z = 3. The crystal structure was refined to a final R 1 = 0.060 for 1747 reflections with F o 4σ ( F o ) and 99 refined parameters. Tiberiobardiite is the Si-analogue of chalcophyllite, with Si 4+ replacing As 5+ through the coupled substitution As 5+ + O 2? = Si 4+ + (OH) ? . The name tiberiobardiite honors Tiberio Bardi (b. 1960) for his contribution to the study of the mineralogy of Tuscany.
机译:在格罗塞托州马萨马里蒂玛(Massa Marittima),格罗塞托(Grosseto),克雷塔奥(Cutaio)铜矿区发现了理想的新矿物物种泰伯iobardiite,最好是Cu 9 Al(SiO 3 OH)2(OH)12(H 2 O)6(SO 4)1.5·10H 2O。意大利的托斯卡纳,非常稀有,呈浅绿色,玻璃态,板状{0001}的准六方晶体,尺寸最大为200μm,厚度为5μm,与青铜矿有关。电子探针分析得出(以重量%计,平均5次点分析):SO 3 10.37,P 2 O 5 3.41,As 2 O 5 0.05,SiO 2 8.13,Al 2 O 3 5.54,Fe 2 O 3 0.74,CuO 62.05 ,以及ZnO 0.03,总计90.32。基于理想的O含量为每个配方单元42个原子,假设存在16个H 2 O基团和13.5个阳离子(不含H),则钛铁钡长晶石的经验式为(Cu 8.69 Al 0.21 Fe 0.10)Σ9.00Al 1.00( Si 1.51 P 0.54)Σ2.05S 1.44 O 12.53(OH)13.47·16H 2O。与多个hkl指数相对应的主衍射线为[d in? (相对视觉强度)]:9.4(s),4.67(s),2.576(m),2.330(m)和2.041(mw)。晶体结构研究表明,斜方晶石为三角形,空间群R 3,单位晶胞参数为a = 10.6860(4),c = 28.3239(10),V = 2801.0(2)。 3,Z =3。对于1747次反射,晶体结构被精炼到最终R 1 = 0.060,其中F o>4σ(F o)和99个精炼参数。泰伯iobardiite是黄铜矿的硅类似物,Si 4+通过偶联取代As 5+ + O 2取代As 5+。 = Si 4+ +(OH)? 。 tiberiobardiite这个名字是为了纪念Tiberio Bardi(生于1960年)而对托斯卡纳矿物学的研究而做出的贡献。

著录项

相似文献

  • 外文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号