... inclusions in fissure-hosted allactite, barite, blixite, calcite, sarkinite, tilasite and finnemanite suggest a low-temperature near-surface formation at, or close to, atmospheric pressure, from aqueous NaCl–CaCl 2 –MgCl 2 solutions of initially moderate salinity. Mineral formation started at temperatures...

...F ig . 4. Structural representation of the refined room-temperature structure of finnemanite. The anisotropic displacement elipsoids are shown with 50% probability. ...

... comparison between experimental band positions and those resulting from Hartree-Fock calculation of an isolated [As 2 O 5 ] 4− anion complex. Spectral comparison was also made with lead arsenites such as synthetic PbAs 2 O 4 and Pb 2 (AsO 2 ) 3 Cl and natural finnemanite to determine the contribution...

...Pete J. Dunn; Donald R. Peacor; B. Darko Sturman; Frederick J. Wicks Abstract Rouseite, ideally Pb 2 Mn(AsO 3 ) 2 ·2H 2 O, is a new mineral species found associated with trigonite and finnemanite from Långban, Värmland, Sweden. Rouseite is triclinic, space group P 1 or P 1 , with a = 6.36(2), b...

... , with a = 13.569(5), b = 20.085(4), c = 7.463(4)Å, β = 105.75(5)°, V = 1958(2)Å 3 , and Z = 2. Freedite is greenish-yellow, with vitreous luster, {100} cleavage, and a specific gravity of 7.0 g/cm 3 (obs). It is found associated with ecdemite, lead, copper, finnemanite, and calcite at the Långban Mine, Värmland...

... Hedyphane (2) Ca 2 Pb 3 (AsO 4 ) 3 Cl Långbanshyttanite (3) Pb 2 Mn 2 Mg(AsO 4 ) 2 (OH) 4 ·6H 2 O Sahlinite (4) Pb 14 (AsO 4 ) 2 O 9 Cl 4 Arsenites Ecdemite (5) Pb 6 Cl 4 (As 2 O 7 ) Freedite (6) Cu + Pb 8 (AsO 3 ) 2 O 3 Cl 5 Finnemanite (7) Pb 5 (AsO 3 ) 3 Cl...

.... , Pring , A. , Schmidt , G. and White , T.J. ( 2008 ) Crystal chemistry of mimetite, Pb 10 (AsO 4 ) 6 Cl 1.48 O 0.26 , and finnemanite, Pb 10 (AsO 3 ) 6 Cl 2 . Acta Crystallogrographica , B64 , 34 – 41 . Brese , N.E. and O'Keeffe , M. ( 1991 ) Bond-valence parameters...

.... Among these, 30 mineral species are unique to these localities and comprise several lead minerals such as oxychlorides (two species), arsenates (four species) and arsenites (eight species). Among lead arsenites, the crystal structures of freedite ( Pertlik, 1987 ), finnemanite ( Effenberger...

... structure studies led to the first reported layer structures, brucite and pyrochroite. Aminoff named the remarkable beryllium minerals bromellite, BeO; and swedenborgite, NaSb[Be 4 O 7 ], a beryllate. Aminoff named finnemanite, Pb 5 (AsO 3 ) 3 Cl, an arsenite related to the apatite structure type, after...

...). Such short Pb-As distances in crystal structures are not unusual. In the two representatives from the apatite group, finnemanite ( Effenberger and Pertlik 1979 ) and mimetite ( Dai et al. 1991 ), distances of 3.27 and 3.37 Å respectively are encountered. In sulfosalts, distances of 3.37 Å are found in, e.g...

... in the large cation sites of apatite. Model 5 is appealing as the substitution is well established in another apatite structure, finnemanite, Pb 5 [AsO 3 □] 3 Cl ( Effenberger and Pertlik, 1997 ), and the formula normalized to Pb = 5 remains correct. However, considering the lack of arsenate in mattheddleite...

... at this point. It is clear that further studies of armangite, finnemanite, gebhardite and georgiadesite should be undertaken. In addition, more complete data (especially indices of refraction) should be determined for the following arsenites: dixenite, ecdemite, fetiasite, graeserite, karibibite, ludlockite...

... , S. and Frost , R.L. ( 2010 b) Raman spectroscopic study of the mineral finnemanite Pb 5 (As 3+ O 3 ) 3 Cl . Journal of Raman Spectroscopy , 41 , 329 – 333 . Bahfenne , S. and Frost , R.L. ( 2010 c) Raman spectroscopic study of the multi-anion mineral dixenite CuMn 2+ 14...

... 6.868 572.4 0.700 Dunn et al . (1985) Ca 9 Sr 1 ([As 0.43 P 0.57 ]O 4 ) 6 (F,OH) 2 Fermorite Smith and Prior (1910) Ba 4.5 Pb 2.3 Ca 3.3 ([As 0.9 P 0.1 ]) O 4 ) 6 Cl 2 Morelandite 10.169 7.315 655.1 0.719 Dunn and Rouse (1978) Pb 10 (AsO 3 ) 6 Cl 2 Finnemanite...

... ): Crystal chemistry of mimetite, Pb 10 (AsO 4 ) 6 Cl 1.48 O 0.26 , and finnemanite, Pb 10 (AsO 3 ) 6 Cl 2 . Acta Crystallogr . B64 , 34 – 41 . Barbier , J. ( 1994 ): Refinement of the eulytite-type Pb 4 (PO 4 ) 2 SO 4 structure . Eur. J. Solid State Inorg. Chem . 31 , 163 – 171...

... of the minerals, see Appendix 1 . Sulfides and sulfarsenides :  algodonite, cobaltite, domeykite, koutekite, löllingite, orpiment, rammelsbergite, realgar, tennantite Arsenites :  armangite, ecdemite, finnemanite, freedite, heliophyllite, magnussonite, manganarsite, paulmooreite, rouseite...

...Figure 24. Structure drawings of (a) finnemanite Pb 10 (As III O 3 ) 6 Cl 2 composed of PbO 3 half prisms and As III O 3 triangular co-ordination, and its oxidized form (b) mimetite Pb 10 (As V O 4 ) 6 Cl 2 constructed from the more usual PbO 6 and As V O 4 polyhedra. The stability...