Zhangpeishanite
| Zhangpeishanite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | BaFCl |
| IMA symbol | Zph[1] |
| Strunz classification | 3.DC.25 |
| Dana classification | 9.2.11.3 |
| Crystal system | Tetragonal |
| Crystal class | Ditetragonal Dipyramidal H-M symbol: 4/mmm (4/m 2/m 2/m) |
| Unit cell | 111.00 |
| Identification | |
| Color | Colorless |
| Twinning | P4/nmm |
| Cleavage | Perfect on {001} |
| Mohs scale hardness | 2.5 |
| Luster | Vitreous |
| Streak | White |
| Diaphaneity | Transparent |
| Specific gravity | 4.54 |
| Density | 4.54 |
| Optical properties | Uniaxial (-) |
| Refractive index | nω = 1.656(2) nε = 1.652(2) |
| Birefringence | 0.004 |
| Ultraviolet fluorescence | None |
| Solubility | Soluble in water |
Zhangpeishanite was named for Zhang Peishan (Chinese: 张培善) mineralogist due to his contributions to Bayan Obo, where the mineral is a type locality. The Bayan Obo deposit is also known for being a world class deposit. The mineral got approved by the IMA in 2006 but was published two years after its approval.[2]
Properties[edit]
Some of the datas collected about zhangpeishanite were carried out on a synthetic equivalent of the mineral, such as cleavage and refractive index, due to zhangpeishanite's minute grain size.[2] The mineral is isostructural with matlockite.[3] It is a member of the matlockite group, and it is the barium dominant analogue of rorisite and matlockite. It is associated with barite, hematite, norsethite and fluorite.[4] The inclusions form as bands within fluorite. The mineral occurs in fluorite as inclusions, up to 100 μm. However, they are typically much smaller, about 50 μm.[2] It consists of barium mostly (71.21%), chlorine (18.94%) and fluorine (9.85%).[5] Singular crystals can be obtained at 1500 K by solid-state reaction between BaF2 and BaCl2.[6]
References[edit]
- ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b c "Zhangpeishanite, BaFCl, a new mineral in fluorite from Bayan Obo, Inner Mongolia, China | Shimazaki, Hidehiko; Miyawaki, Ritsuro; Yokoyama, Kazumi; Matsubara, Satoshi; Yang, Zhuming | download". ur.booksc.eu. Retrieved 2021-08-13.
- ^ "Zhangpeishanite". www.mindat.org. Retrieved 2021-08-13.
- ^ "Zhangpeishanite, BaFCl, a new mineral in fluorite from Bayan Obo, Inner Mongolia, China | Request PDF". ResearchGate. Retrieved 2021-08-13.
- ^ "Zhangpeishanite Mineral Data". webmineral.com. Retrieved 2021-08-13.
- ^ Chukanov, Nikita V.; Chervonnyi, Alexandr D. (2016-03-09). Infrared Spectroscopy of Minerals and Related Compounds. Springer. ISBN 978-3-319-25349-7.
