GYIG OpenIR  > 矿床地球化学国家重点实验室
Hanjiangite, a new barium-vanadium phyllosilicate carbonate mineral from the Shiti barium deposit in the Dabashan region, China
Jiajun Liu;   Guowu Li;   Qian Mao;   Shenghua Wu;   Zhenjiang Liu;   Shangguo Su;   Ming Xiong;   Xiaoyan Yu
2012
Source PublicationAmerican Mineralogist
Volume97Issue:2-3Pages:281-290
Abstract

Hanjiangite, ideal formula Ba2Ca(V3+Al)[Si3AlO10(OH)2]F(CO3)2, is a new mineral found in the Shiti barium deposit in the Dabashan region, China. Hanjiangite was collected from lenticular witherite ore bodies and witherite-barite-quartz veins cutting carbonaceous slates. It is found as disseminations in both settings. It occurs as thin, euhedral, tetragonal, tabular crystals, and anhedral grains. Grain size commonly varies from 0.05 to 4 mm and occasionally reaches 15 mm. It is yellow-green or dark green, with one well-developed or perfect cleavage on {001}. Other physical properties are: brittle, transparent to translucent, nonfluorescent, vitreous luster, greenish white streak, hardness 4 in the Mohs scale, splintery fracture, and a measured density of 3.69 g/cm3 . Hanjiangite is biaxial (–), α = 1.615, β = 1.655, γ = 1.700 (589 nm), and displays strong pleochroism from pale yellow-green to dark green. It is monoclinic, with unit-cell parameters refined from single-crystal X-ray diffraction: a = 5.2050(12), b = 9.033(2), c = 32.077(8) Å, β = 93.49(8)°, V = 1505.4(8) Å3 , Z = 4, space group C2. The strongest seven lines of the X-ray powder-diffraction pattern [d in Å(I)(hkl)] are: 15.866(7)(002), 5.340(91)(006), 4.010(10)(114), 3.209(23) (027), 2.676(100) (1110), 2.294(29)(137), and 2.008(11)(228). Chemical analysis by a combination of electron microprobe, HF combustion, IR absorption, thermogravimetric analysis (TGA) and crystal-structure refinement gives SiO2 19.64, TiO2 1.12, Al2O3 11.19, MgO 0.54, CaO 4.91, BaO 34.89, V2O3 9.93, Cr2O3 1.75, Na2O 0.20, K2O 0.06, MnO 0.01, FeO 0.02, NiO 0.01, SrO 0.34, Y2O3 0.85, La2O3 0.14, Nd2O3 0.26, F 1.80, Cl 0.04, CO2 10.37, H2O 1.30, F=O –0.76, Cl=O –0.01, sum 98.60 wt%. The empirical formula is (Ba1.98Na0.06K0.01)Σ2.05(Ca0.76Mg0.12Y0.06Sr0.03 La0.01Nd0.01)Σ0.99 (V1.15Al0.75Cr0.20Ti0.12)Σ2.22[(Si2.84Al1.16)Σ4.00O10][(OH)1.25O0.77]Σ2.02(F0.82Cl0.01)Σ0.83(CO3)2.05 based on 19 anions per formula unit. A single-crystal X-ray structure determination (sample 2005st-17) was carried out with a Smart APEX CCD system using MoKα (λ = 0.71073 Å) radiation. The structure was solved using direct methods, and refined with the SHELXTL PC (Bruker AXS Inc.) package. Anisotropic refinement using all measured independent data and reflections with I > 2σ(I) resulted in an R1 factor of 0.08 and wR2 of 0.20. The crystal structure is composed of alternating T-O-T and Ba2Ca(CO3)2F layers. The Ba2Ca(CO3)2F layer occurs between the T-O-T layers. The T site contains both Si and Al, and the O site both V3+ and Al. The interlayer hosts not only Ba (like in chernykhite) but also Ca atoms and (CO3) groups. While the coordination of the cations in the TOT layer is obvious, the coordinations of Ca and Ba in the interlayer are not straight forward. A hanjiangite has three polytypes, namely 1M-type, 2M-type, and 3T-type.

KeywordNew Mineral hanjiangite Electron-microprobe Data Single-crystal X-ray Diffraction crystal Structure shiti Barium Deposit ankang County china
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/11007
Collection矿床地球化学国家重点实验室
Affiliation1.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Beijing), Beijing 100083, P.R. China
2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, P.R. China
3.School of Earth Earth Science and Resources, China University of Geosciences (Beijing), Beijing 100083, P.R. China
4.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, P.R. China
5.School of Gemology, China University of Geosciences (Beijing), Beijing 100083, P.R. China
Recommended Citation
GB/T 7714
Jiajun Liu; Guowu Li; Qian Mao; Shenghua Wu; Zhenjiang Liu; Shangguo Su; Ming Xiong; Xiaoyan Yu. Hanjiangite, a new barium-vanadium phyllosilicate carbonate mineral from the Shiti barium deposit in the Dabashan region, China[J]. American Mineralogist,2012,97(2-3):281-290.
APA Jiajun Liu; Guowu Li; Qian Mao; Shenghua Wu; Zhenjiang Liu; Shangguo Su; Ming Xiong; Xiaoyan Yu.(2012).Hanjiangite, a new barium-vanadium phyllosilicate carbonate mineral from the Shiti barium deposit in the Dabashan region, China.American Mineralogist,97(2-3),281-290.
MLA Jiajun Liu; Guowu Li; Qian Mao; Shenghua Wu; Zhenjiang Liu; Shangguo Su; Ming Xiong; Xiaoyan Yu."Hanjiangite, a new barium-vanadium phyllosilicate carbonate mineral from the Shiti barium deposit in the Dabashan region, China".American Mineralogist 97.2-3(2012):281-290.
Files in This Item: Download All
File Name/Size DocType Version Access License
Hanjiangite, a new b(11435KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Jiajun Liu; Guowu Li; Qian Mao; Shenghua Wu; Zhenjiang Liu; Shangguo Su; Ming Xiong; Xiaoyan Yu]'s Articles
Baidu academic
Similar articles in Baidu academic
[Jiajun Liu; Guowu Li; Qian Mao; Shenghua Wu; Zhenjiang Liu; Shangguo Su; Ming Xiong; Xiaoyan Yu]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Jiajun Liu; Guowu Li; Qian Mao; Shenghua Wu; Zhenjiang Liu; Shangguo Su; Ming Xiong; Xiaoyan Yu]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Hanjiangite, a new barium-vanadium phyllosilicate carbonate mineral from the Shiti barium deposit in the Dabashan region, China.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.