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Erlianite, a new vanadium- and iron-bearing silicate mineral

Published online by Cambridge University Press:  05 July 2018

Xiancan Feng  and
Ruiying Yang
Xiancan Feng
Affiliation:
The Geological Experimental Testing Centre, Geological Mineral Resources Bureau, Inner Mongolia Autonomous Region, Huhehaote, China
Ruiying Yang
Affiliation:
The Geological Experimental Testing Centre, Geological Mineral Resources Bureau, Inner Mongolia Autonomous Region, Huhehaote, China
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Abstract

Erlianite was found in the Harhada iron deposit along the Jining-Erlian railway, Inner Mongolia Autonomous Region, People's Republic of China. The occurrence formed at a high pressure and low temperature and the mineral occurs sparingly, mainly on fracture surfaces on which there is evidence of movement. It is associated with quartz, magnetite, siderite, albite, stilpnomelane, minnesotaite, deerite, etc.

Erlianite is black with a brownish streak, silky lustre and occur as fibres, flakes, and lath-like aggregates. The grain size is 1–2 cm. It is not fluorescent. H = 3.7, D = 3.11. Cleavages on {001} and {100} are perfect; orthorhombic Pmmn or Pm21n with a = 23.20, b = 9.20, c = 13.18, Å and Z = 1. Strongest lines are 11.5(100)(200, 101), 3.05(50)(223,130), 2.89(60)(603,800,231,621), 2.61(60) (523,105,332,224), 2.52(50)(901,115,033,531), and 1.560(50) (12.0.5,14.2.0). Biaxial negative with α = 1.667, β = 1.674, γ = 1.679, 2V = 56–59°. Analysis gave SiO2 38.80, FeO 26.67, Fe2O3 21.26, V2O5 1.15, MgO 1.00, CaO 0.83, MnO 0.55, P2O5 0.051, K2O 0.079, Na2O 0.09, Al2O3 0.19, TiO2 0.38, H2O+ 7.65, H2O- 0.90, total 99.60%, leading to (Fe19.962+Fe2.193+Mg1.33Mn0.42)Σ23.90(Fe11.323+V0.68)Σ12(Si34.73Ti0.26Al0.20Fe0.813+)Σ36O90(OH,O)48 (one unit cell content for O = 138).

The sample of the new mineral was discovered in 1977 during an investigation of an iron deposit which has been named ‘M14’. The methods used for studying this mineral included optical microscopy, X-ray powder diffraction, selected area electron diffraction analysis, wet chemical analysis, DTA, TGA, infra-red absorption and Mosbauer spectroscopy.

Keywords

erlianitenew mineraliron depositsiron silicatesChina
Type
Mineralogy
Information
Mineralogical Magazine , Volume 50 , Issue 356 , June 1986 , pp. 285 - 289
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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References

Xianying, Meng and Kexin, Guo (1984) TEM study of a vanadium-bearing iron silicate, Ada Mineralogica Sinica, 2, 106-10.(in Chinese).Google Scholar
Qi Sijing el al.(1979) Journal of Hebei College of Geology, 3, 1 (in Chinese).Google Scholar