Research output: Contribution to journal › Article › peer-review
Pb 2(AsO 2OH)Cl 2, a new phase from the Lavrion ancient slags, Greece : Occurrence and characterization. / Siidra, O. I.; Chukanov, N. V.; Pekov, I. V.; Krivovichev, S. V.; Magganas, A.; Katerinopoulos, A.; Voudouris, P.
In: Mineralogical Magazine, Vol. 76, No. 3, 2012, p. 597-602.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Pb 2(AsO 2OH)Cl 2, a new phase from the Lavrion ancient slags, Greece
T2 - Occurrence and characterization
AU - Siidra, O. I.
AU - Chukanov, N. V.
AU - Pekov, I. V.
AU - Krivovichev, S. V.
AU - Magganas, A.
AU - Katerinopoulos, A.
AU - Voudouris, P.
PY - 2012
Y1 - 2012
N2 - Transparent prismatic crystals of Pb 2(AsO 2OH)Cl 2 were collected in black metallurgical slag on the coast in the Punta Zeza area, 3 km south of the town of Lavrion, Greece. Analyses by energy-dispersive X-ray spectrometry (EDS) provided the following chemical composition: PbO 73.04, As 2O 3 15.97, Cl 11.42, O=Cl-2.58, total 97.85 wt.%. The empirical formula calculated on the basis of As = 1 is H x Pb 2.03(AsO 3) 1.00Cl 1.995 (x = 0.96). The infrared spectrum of Pb 2(AsO 2OH)Cl 2 has characteristic AsO 3 3- bands at 707 and 594 cm -1, O-H stretching vibrations at 3310 and 2900 cm -1 and a band at 1107 cm -1 which is assigned to As-O-H bending vibrations. The structure, which is monoclinic P21/m, a = 6.4235(8), b = 5.5399(7), c = 9.321(1) Å, β = 90.767(2), V = 331.67(7) Å 3, R 1 = 0.035, is identical to that of synthetic Pb 2(AsO 2OH)Cl 2 and contains two symmetrically unique Pb sites and one As site. The crystal structure is based on [Pb 2AsO 2OH] 2+ double chains interconnected via weak Pb-Cl bonds to produce a three-dimensional framework which is closely related to that of Pb oxysalt minerals containing [O 2Pb 3] 2+ chains of oxocentred [OPb 4] 6+ tetrahedra including mendipite, damaraite, rickturnerite and plumboselite.
AB - Transparent prismatic crystals of Pb 2(AsO 2OH)Cl 2 were collected in black metallurgical slag on the coast in the Punta Zeza area, 3 km south of the town of Lavrion, Greece. Analyses by energy-dispersive X-ray spectrometry (EDS) provided the following chemical composition: PbO 73.04, As 2O 3 15.97, Cl 11.42, O=Cl-2.58, total 97.85 wt.%. The empirical formula calculated on the basis of As = 1 is H x Pb 2.03(AsO 3) 1.00Cl 1.995 (x = 0.96). The infrared spectrum of Pb 2(AsO 2OH)Cl 2 has characteristic AsO 3 3- bands at 707 and 594 cm -1, O-H stretching vibrations at 3310 and 2900 cm -1 and a band at 1107 cm -1 which is assigned to As-O-H bending vibrations. The structure, which is monoclinic P21/m, a = 6.4235(8), b = 5.5399(7), c = 9.321(1) Å, β = 90.767(2), V = 331.67(7) Å 3, R 1 = 0.035, is identical to that of synthetic Pb 2(AsO 2OH)Cl 2 and contains two symmetrically unique Pb sites and one As site. The crystal structure is based on [Pb 2AsO 2OH] 2+ double chains interconnected via weak Pb-Cl bonds to produce a three-dimensional framework which is closely related to that of Pb oxysalt minerals containing [O 2Pb 3] 2+ chains of oxocentred [OPb 4] 6+ tetrahedra including mendipite, damaraite, rickturnerite and plumboselite.
KW - ancient slag
KW - crystal structure
KW - Lavrion
KW - lead arsenite
KW - protonated oxoanions
UR - http://www.scopus.com/inward/record.url?scp=84863523188&partnerID=8YFLogxK
U2 - 10.1180/minmag.2012.076.3.10
DO - 10.1180/minmag.2012.076.3.10
M3 - Article
AN - SCOPUS:84863523188
VL - 76
SP - 597
EP - 602
JO - Mineralogical Magazine
JF - Mineralogical Magazine
SN - 0026-461X
IS - 3
ER -
ID: 9145363