Crystal chemistry of a Ni-Mg-analogue of lyonsite from slags of Lavrion, Greece

Natalya Koshlyakova, Natalia V. Zubkova, Igor V. Pekov, Gerald Giester, Dmitry Y. Pushcharovsky, Nikita V. Chukanov, Panagiotis Voudouris, Andreas Magganas, Athanasios Katerinopoulos

Veröffentlichungen: Beitrag in FachzeitschriftArtikelPeer Reviewed

Abstract

A novel Ni-Mg-analogue of lyonsite, Cu 3+x(Fe 3+ 4-2x Cu 2x)(VO 4) 6 (0 ≥ × ≥1), with substitution of Ni and Mg for Cu (below: NMAL) was found in old metallurgical slags from the historical Lavrion mining district in Greece. NMAL forms reddish-black, with semimetallic lustre, prismatic to acicular crystals up to 1 mm long and up to 0.2 mm thick and is associated with anthropogenic counterparts of liebenbergite, trevorite, schaferite, bamiermanite, albite, nosean, hauyne and others. The crystal structure of NMAL was solved from single-crystal X-ray diffraction data (298 K), R = 0.0238. NMAL is orthorhombic, Pnma, a = 4.9573(3), b = 10.1672(8), c = 17.1605(12) Å, V= 864.92(11) Å 3. Its chemical composition, determined by electron microprobe, is: MgO 5.71, NiO 19.62, ZnO 0.84, A1 2O 3 0.84, Mn 2O 3 0.24, Fe 2O 3 18.43, SiO 2 0.06, TiO 2 1.82, P 2O 5 0.38, V 2O 5 51.77, total 99.72 wt.%. The formula derived from both the crystal structure and electron microprobe data is (Z=2): 4(1)(Fe 3+ 2.48Ni 1.28Ti 0.12A1 0.12) σ4 A(2)(Mg 1.22Ni 0.44Zn 0.10) σ1.76 A(2')(Mg 0.16Ni 0.06Zn 0.020.24 4(3)(Ni 0.54Ti 0.08Al 0.020.28) σ0.92 A(3')(Ni 0.62Ti 0.08Al 0.040.34) σ1.08(VO 4) 6 (calculated on the basis of 24 0 atoms). The bulk formula of NMAL is (Ni 2.94Fe 3+ 2.48Mg 1.28Ti 0 28Al 0.18Zn 0.120.62) σ8(VO 4) 6 and the simplified crystal-chemical formula is (Ni,□) 2(Mg,Ni) 2(Fe 3+,Ni) 4(VO 4) 6.

OriginalspracheEnglisch
Seiten (von - bis)113-120
Seitenumfang8
FachzeitschriftNeues Jahrbuch für Mineralogie. Abhandlungen
Jahrgang193
Ausgabenummer2
Frühes Online-DatumJan. 2016
DOIs
PublikationsstatusVeröffentlicht - 1 Apr. 2016

ÖFOS 2012

  • 105116 Mineralogie
  • 105113 Kristallographie

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