Francisite, Cu3Bi(SeO3)2O2Cl, a new mineral from Iron Monarch, South Australia: description and crystal structure

Allan Pring; Bryan M. Gatehouse; William D. Birch

Francisite, Cu₃Bi(SeO₃)₂O₂Cl, a new mineral from Iron Monarch, South Australia: description and crystal structure

Allan Pring, Bryan M. Gatehouse, William D. Birch

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58 Citations (Scopus)

Abstract

Francisite is a new copper bismuth oxy-chloro selenite from Iron Monarch, South Australia. The new mineral occurs as radiating clusters of bright green bladed crystals up to 0.25 mm in length. The crystals are elongated along [010], and the principal forms are {100}, {011}, and {101}. Associated with francisite are barite, chlorargyrite, muscovite, native bismuth, naumannite, djurleite, and a number of poorly characterized selenides of Bi, Ag, and Cu. Francisite appears to have formed as a result of hydrothermal alteration of the selenide and sulfide minerals. The simplified formula is close to Cu₃Bi(SeO₃)₂O₂Cl. The mineral is transparent and has a pale green streak. The estimated Mohs hardness is 3-4, and D_calc = 5.42 gm/cm³. The crystal structure and the results of single crystal studies and X-ray powder diffraction are reported. -after Authors

Original language	English
Pages (from-to)	1421-1425
Number of pages	5
Journal	American Mineralogist
Volume	75
Issue number	11-12
Publication status	Published - 1 Jan 1990
Externally published	Yes

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Pring, A., Gatehouse, B. M., & Birch, W. D. (1990). Francisite, Cu₃Bi(SeO₃)₂O₂Cl, a new mineral from Iron Monarch, South Australia: description and crystal structure. American Mineralogist, 75(11-12), 1421-1425. http://www.minsocam.org/ammin/AM75/AM75_1421.pdf

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title = "Francisite, Cu3Bi(SeO3)2O2Cl, a new mineral from Iron Monarch, South Australia: description and crystal structure",

abstract = "Francisite is a new copper bismuth oxy-chloro selenite from Iron Monarch, South Australia. The new mineral occurs as radiating clusters of bright green bladed crystals up to 0.25 mm in length. The crystals are elongated along [010], and the principal forms are {100}, {011}, and {101}. Associated with francisite are barite, chlorargyrite, muscovite, native bismuth, naumannite, djurleite, and a number of poorly characterized selenides of Bi, Ag, and Cu. Francisite appears to have formed as a result of hydrothermal alteration of the selenide and sulfide minerals. The simplified formula is close to Cu3Bi(SeO3)2O2Cl. The mineral is transparent and has a pale green streak. The estimated Mohs hardness is 3-4, and Dcalc = 5.42 gm/cm3. The crystal structure and the results of single crystal studies and X-ray powder diffraction are reported. -after Authors",

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year = "1990",

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T1 - Francisite, Cu3Bi(SeO3)2O2Cl, a new mineral from Iron Monarch, South Australia

T2 - description and crystal structure

AU - Pring, Allan

AU - Gatehouse, Bryan M.

AU - Birch, William D.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Francisite is a new copper bismuth oxy-chloro selenite from Iron Monarch, South Australia. The new mineral occurs as radiating clusters of bright green bladed crystals up to 0.25 mm in length. The crystals are elongated along [010], and the principal forms are {100}, {011}, and {101}. Associated with francisite are barite, chlorargyrite, muscovite, native bismuth, naumannite, djurleite, and a number of poorly characterized selenides of Bi, Ag, and Cu. Francisite appears to have formed as a result of hydrothermal alteration of the selenide and sulfide minerals. The simplified formula is close to Cu3Bi(SeO3)2O2Cl. The mineral is transparent and has a pale green streak. The estimated Mohs hardness is 3-4, and Dcalc = 5.42 gm/cm3. The crystal structure and the results of single crystal studies and X-ray powder diffraction are reported. -after Authors

AB - Francisite is a new copper bismuth oxy-chloro selenite from Iron Monarch, South Australia. The new mineral occurs as radiating clusters of bright green bladed crystals up to 0.25 mm in length. The crystals are elongated along [010], and the principal forms are {100}, {011}, and {101}. Associated with francisite are barite, chlorargyrite, muscovite, native bismuth, naumannite, djurleite, and a number of poorly characterized selenides of Bi, Ag, and Cu. Francisite appears to have formed as a result of hydrothermal alteration of the selenide and sulfide minerals. The simplified formula is close to Cu3Bi(SeO3)2O2Cl. The mineral is transparent and has a pale green streak. The estimated Mohs hardness is 3-4, and Dcalc = 5.42 gm/cm3. The crystal structure and the results of single crystal studies and X-ray powder diffraction are reported. -after Authors

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