TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=0025672375&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0025672375
VL - 75
SP - 1421
EP - 1425
JO - American Mineralogist
JF - American Mineralogist
SN - 0003-004X
IS - 11-12
ER -