The chemistry and structure of redledgeite.

B. M. Gatehouse; G. C. Jones; A. Pring; R. F. Symes

doi:10.1180/minmag.1986.050.358.18

The chemistry and structure of redledgeite.

B. M. Gatehouse
, G. C. Jones
, A. Pring
, R. F. Symes

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Two distinct habits are described for redledgeite from the Red Ledge gold mine, California, small black bipyramidal crystals and yellow-green fibres. It is a Ba-Cr-Ti oxide rather than a Mg-Cr-Ti oxide as previously supposed; microprobe analysis gave Ba_1.10(Cr_1.82Ti_5.95Fe_0.10V_0.08)O₁₆ and Ba_1.27(Cr_2.48Ti_5.49Fe_0.02)O₁₆ for the black and yellow-green forms respectively. The mineral is a monoclinic hollandite-type phase, space group I2/m, with a 10.129, b 2.95, c 10.135 A, beta 90.05; Z = 1; D(calc.) for the black form 4.413 g/cm³. The crystal structure was refined to R 6.3% using 1017 reflections; electron diffraction revealed weak superlattice reflections, with a period of 2.24 b due to tunnel cation ordering.-R.A.H.

Original language	English
Pages (from-to)	709-715
Number of pages	7
Journal	Mineralogical Magazine
Volume	50
Issue number	358
DOIs	https://doi.org/10.1180/minmag.1986.050.358.18
Publication status	Published - Dec 1986
Externally published	Yes

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title = "The chemistry and structure of redledgeite.",

abstract = "Two distinct habits are described for redledgeite from the Red Ledge gold mine, California, small black bipyramidal crystals and yellow-green fibres. It is a Ba-Cr-Ti oxide rather than a Mg-Cr-Ti oxide as previously supposed; microprobe analysis gave Ba1.10(Cr1.82Ti5.95Fe0.10V0.08)O16 and Ba1.27(Cr2.48Ti5.49Fe0.02)O16 for the black and yellow-green forms respectively. The mineral is a monoclinic hollandite-type phase, space group I2/m, with a 10.129, b 2.95, c 10.135 A, beta 90.05; Z = 1; D(calc.) for the black form 4.413 g/cm3. The crystal structure was refined to R 6.3\% using 1017 reflections; electron diffraction revealed weak superlattice reflections, with a period of 2.24 b due to tunnel cation ordering.-R.A.H.",

author = "Gatehouse, \{B. M.\} and Jones, \{G. C.\} and A. Pring and Symes, \{R. F.\}",

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TY - JOUR

T1 - The chemistry and structure of redledgeite.

AU - Gatehouse, B. M.

AU - Jones, G. C.

AU - Pring, A.

AU - Symes, R. F.

PY - 1986/12

Y1 - 1986/12

N2 - Two distinct habits are described for redledgeite from the Red Ledge gold mine, California, small black bipyramidal crystals and yellow-green fibres. It is a Ba-Cr-Ti oxide rather than a Mg-Cr-Ti oxide as previously supposed; microprobe analysis gave Ba1.10(Cr1.82Ti5.95Fe0.10V0.08)O16 and Ba1.27(Cr2.48Ti5.49Fe0.02)O16 for the black and yellow-green forms respectively. The mineral is a monoclinic hollandite-type phase, space group I2/m, with a 10.129, b 2.95, c 10.135 A, beta 90.05; Z = 1; D(calc.) for the black form 4.413 g/cm3. The crystal structure was refined to R 6.3% using 1017 reflections; electron diffraction revealed weak superlattice reflections, with a period of 2.24 b due to tunnel cation ordering.-R.A.H.

AB - Two distinct habits are described for redledgeite from the Red Ledge gold mine, California, small black bipyramidal crystals and yellow-green fibres. It is a Ba-Cr-Ti oxide rather than a Mg-Cr-Ti oxide as previously supposed; microprobe analysis gave Ba1.10(Cr1.82Ti5.95Fe0.10V0.08)O16 and Ba1.27(Cr2.48Ti5.49Fe0.02)O16 for the black and yellow-green forms respectively. The mineral is a monoclinic hollandite-type phase, space group I2/m, with a 10.129, b 2.95, c 10.135 A, beta 90.05; Z = 1; D(calc.) for the black form 4.413 g/cm3. The crystal structure was refined to R 6.3% using 1017 reflections; electron diffraction revealed weak superlattice reflections, with a period of 2.24 b due to tunnel cation ordering.-R.A.H.

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DO - 10.1180/minmag.1986.050.358.18

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SN - 0026-461X

VL - 50

SP - 709

EP - 715

JO - Mineralogical Magazine

JF - Mineralogical Magazine

IS - 358

ER -

The chemistry and structure of redledgeite.

Abstract

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