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| | Book | | Sammlung Deutsch land The KRUGERHAUS in Freiberg, Saxony 8 KROGERH :I I Dr.ErichKruger( I885-1968)... 13 Foreword Germany ...Terra Germaniae The ideal place of exhibition ... Germany - is a country...all over Germany, from the plains in the north, from numerous highlands in the middle of Germany and from...to science, and in turn to culture and art in Germany. The exploitation of mineral wealth reached from...deposits in the Lausitz area. Journey through Germany On the ground floor of the Krtiger-Haus you will | 👁 Image
| | Journal (article/letter/editorial) | | al. 1998, Nesbitt et al.
1998, 2000, 2001, 2002, Uhlig et al. 2001, Biegelsen
et al. 1990a, b, Pashley...(Nesbitt et al. 2000, Schaufuss et al.
1998a, b, Uhlig et al. 2001).
The kinetic energy of the Cu 2p and...those of other sulfides. Chalcopyrite, pyrite, marcasite
1624
THE CANADIAN MINERALOGIST
FIG. 3. A)...Nesbitt et al. 1998,
2000, Schaufuss et al. 1998a, Uhlig et al. 2001). Thus,
an alternative approach to the...conventional
XPS S 2p spectra of chalcopyrite, pyrite, marcasite,
arsenopyrite and pyrrhotite (Harmer et al. 2004 | 👁 Image
| Elsetinow, Alicia R, Strongin, Daniel R, Borda, Michael J, Schoonen, Martin A, Rosso, Kevin M (2003) Characterization of the structure and the surface reactivity of a marcasite thin film. Geochimica et Cosmochimica Acta, 67 (5) 807-812 doi:10.1016/s0016-7037(02)00923-7 | Journal (article/letter/editorial) | | the structure and the surface reactivity of a marcasite thin film
ALICIA R. ELSETINOW,1 DANIEL R. STRONGIN...form April 5, 2002)
Abstract—A thin film of marcasite, FeS2, was synthesized under vacuum and its structure...films showed that the film crystallized in the marcasite
phase of FeS2. Atomic force microscopy indicated...photoelectron spectroscopy studies found
the thin marcasite film to be more reactive than natural pyrite (the...of sulfate formation. Likely the
oxidation of marcasite was dominated by its short-range order (e.g., | 👁 Image
| Nesbitt, H.W, Schaufuß, A, Sciani, M, Hchst, H, Bancroft, G.M, Szargan, R (2003) Monitoring fundamental reactions at NiAsS surfaces by synchrotron radiation X-ray photoelectron spectroscopy: As and S air oxidation by consecutive reaction schemes. Geochimica et Cosmochimica Acta, 67 (5) 845-858 doi:10.1016/s0016-7037(02)00944-4 | Journal (article/letter/editorial) | | Universitat Leipzig, Linnestrasse 2, D-04103, Leipzig, Germany
3
Department of Chemistry, University of Western...2a) but is observed in the S 2p spectrum
of marcasite (Uhlig et al., 2001) who interpreted it as surface...via surface
polymeric reactions as on marcasite surfaces (Uhlig et al., 2001).
Because As is an essential...of the mineral, as observed on marcasite and
loellingite surfaces (Uhlig et al., 2001; Nesbitt et al.,...between 40
and 50% of the signal.
SRXPS studies of marcasite (FeS2) and loellingite (FeAs2)
reveal surface | 👁 Image
| Jackson, Deane A., Nesbitt, H. Wayne, Scaini, Michael J., Duggal, Avin, Bancroft, G. Michael (2003) Gersdorffite (NiAsS) chemical state properties and reactivity toward air and aerated, distilled water. American Mineralogist, 88 (5) 890-900 doi:10.2138/am-2003-5-619 | Journal (article/letter/editorial) | | binding-energy side of the
peak.
GaAs, pyrite, marcasite, and arsenopyrite are semiconductors (not conductors)... the asymmetry of the Fe 2p
peaks of pyrite, marcasite, and arsenopyrite result from surface Fe contributions...Fe atoms in these
phases (Nesbitt et al. 2000; Uhlig et al. 2001; Schaufuss et al.
2000). By analogy...surface atoms in the Fe 2p
spectra of pyrite and marcasite is about 0.7 eV above the main
peak; a shift of...to S-S dimers at pyrite and marcasite surfaces (Nesbitt et al. 2000; Uhlig et al. 2001). The third
contribution | 👁 Image
| | Journal (article/letter/editorial) | | online February 2010
Dissolution kinetics of marcasite at acidic pH
MARÍA P. ASTA1,2,*, JORDI CAMA1...Cerbuna 12, Zaragoza 50009, Spain
Abstract: Marcasite (FeS2), which is a polymorph of pyrite and isostructural...104 mol L1), and temperature (25–70 C) on marcasite
dissolution were studied by means of stirred and...experiments. Under these experimental conditions,
marcasite dissolution was characterized by a systematic...effects of pH,
dissolved oxygen and temperature on marcasite dissolution is proposed as:
14:78:5
0:11 0:02 | 👁 Image
| | Journal (article/letter/editorial) | | pyrrhotite is rapidly replaced by secondary pyrite/marcasite, siderite and void
space, this reaction defining...standard
metallography texts (e.g. EVANS 1960; UHLIG
1948) and its suggested application to the
weathering...is rapidly replaced by
secondary pyrite and/or marcasite. Chalcopyrite, cobaltiferous pyrite, the spinels...iron disulphides
pyrite (pyrite 11)
and marcasite (marcasite II). These secondary
phases are always intimately...pseudomorphous and
hence the pyrite II and/or marcasite II is
confined to the ex-pyrrhotite sites where | 👁 Image
| | Journal (issue) | | Schneeberg Mining District,
Western Erzgebirge, Saxony, Germany ....................................... 620...Schneeberg District in the famous Saxon Erzgebirge of Germany
has been a source of mineral specimens and mineral...Sammlungen,
Brennhausgasse 14, D-09599 Freiberg, Germany. Email: Andreas
.Massanek@geosamm.tu-freiberg.de...de
2
Naunhoferstrasse 49, D-04299 Leipzig, Germany. Email: info@sm
-mineral.de
3
Senckenberg Naturhistorische...Dresden, Germany. Email: Klaus.Thalheim@senckenberg.de
4
Teichstrasse 22, D-08321 Zschorlau, Germany. Email: | 👁 Image
| Müller, Daniel, Kaminski, Klaus, Uhlig, Stephan, Graupner, Torsten, Herzig, Peter M., Hunt, Steve (2002) The transition from porphyry- to epithermal-style gold mineralization at Ladolam, Lihir Island, Papua New Guinea: a reconnaissance study. Mineralium Deposita, 37 (1) 61-74 doi:10.1007/s00126-001-0230-y | Journal (article/letter/editorial) | | L E
Daniel Müller Æ Klaus Kaminski Æ Stephan Uhlig
Torsten Graupner Æ Peter M. Herzig Æ Steve Hunt...1007/s00126-001-0230-y
D. Müller (&) Æ K. Kaminski Æ S. Uhlig
T. Graupner Æ P.M. Herzig
Institut für Mineralogie...Freiberg,
Brennhausgasse 14, D-09596 Freiberg, Germany
E-mail: damuell@mineral.tu-freiberg.de
Fax: +49-3731-392610...mineralization consists
mainly of pyrite with minor marcasite and rare chalcopyrite ± galena ± tetrahedrite...anisotropic indicating a
gradation to arsenian pyrite. Marcasite typically forms
fibrous-bladed morphologies. Galena | 👁 Image
| Nesbitt, H.W., Berlich, A.G., Harmer, S.L., Uhlig, I., Bancroft, G.M., Szargan, R. (2004) Identification of pyrite valence band contributions using synchrotron-excited X-ray photoelectron spectroscopy. American Mineralogist, 89 (2) 382-389 doi:10.2138/am-2004-2-319 | Journal (article/letter/editorial) | | W. NESBITT,1,* A.G. BERLICH,2 S.L. HARMER,1 I. UHLIG,2 G.M. BANCROFT,3 AND R. SZARGAN2
2
1
Department...Universität Leipzig, Linnéstrasse 2, D-O4103, Germany
3
Department of Chemistry, University of Western...of
Canada grants to H.W.N. and G.M.B., a BMBF (Germany) grant to R.S., and by
NSF under Award No. DMR-00884402...(1982) Electronic structure of 3d pyrite- and marcasite-type sulphides.
Journal of Physics C: Solid State...(1972) Energy bands in TX2 compounds with pyrite, marcasite
and arsenopyrite structures. Journal of Solid | 👁 Image
| | Journal (article/letter/editorial) | | by disproportionation
(Guevremont et al., 1997; Uhlig et al., 2001). Disproportionation reactions result...Herbert et al. (1998),
Nesbitt et al. (1998), and Uhlig et al. (2001).
b
The difference in line energy from...Fe(III)-S multiplets in
accordance with convention (Uhlig et al., 2001). Peak widths were not
constrained;...1993; Herbert et al., 1998; Nesbitt et al., 1998; Uhlig et al., 2001).
Errors in peak area were estimated...of broken disulfide bonds (Nesbitt et al., 1998; Uhlig et al.,
2001). Peaks somewhat larger than the S(-II)-Fe | 👁 Image
| | Journal (article/letter/editorial) | | synchrotron radiation storage ring
BESSY II (Berlin, Germany) at pressure of 108 Pa and
room temperature....b; Elsetinow et al., 2000; Nesbitt et al., 2000; Uhlig et al., 2001;
Leiro et al., 2003; Kendelewicz et...(Scaini et al., 1997; Schaufuss
et al., 1998a,b; Uhlig et al., 2001; Kendelewicz et al.,
2004). During...A. H. (1997) Gold-bearing arsenian pyrite
and marcasite and arsenopyrite from Carlin Trend gold
deposits...Federation. Econ. Geol. 93, 463–487.
Hallmeier K. H., Uhlig I. and Szargan R. (2002) Sulphur L2,3 and
L1 XANES | 👁 Image
| | Journal (article/letter/editorial) | | al. 2003, Li et al. 1974;
Bocquet et al. 1992; Uhlig et al. 2001), and the conduction band studied using...pressure x-ray
diffraction study on pyrite (p-FeS2), marcasite (m-FeS2) and
manganese disulfide to 340 kbar: a...of transition metal disulfides FeS2
(pyrite and marcasite), CoS2, NiS2 and CuS2, and their isomorphs FeAsS...pyrite FeS2.
Phys Rev B 65:054107–1-12
Nesbitt HW, Uhlig I, Bancroft GM, Szargan R (2003) Resonant
XPS study...Tossell JA, Vaughan DJ, Burdett JK (1981) Pyrite, marcasite, and
arsenopyrite type minerals:crystal chemical | 👁 Image
| | Journal (article/letter/editorial) | | 1998; Nesbitt et al., 2000;
Rosso et al., 2000; Uhlig et al., 2001; Leiro et al., 2003;
Mattila et al...1067–1076.
Nesbitt H. W., Berlich A. G., Harmer S. L., Uhlig I., Bancroft G.
M. and Szargan R. (2004) Identification... Am. Mineral. 85(5–6), 850–857.
Nesbitt H. W., Uhlig I., Bancroft G. M. and Szargan R. (2003)
Resonant... Elsevier Scientific Publishing Co., Amsterdam.
Uhlig I., Szargan R., Nesbitt H. W. and Laajalehto K....(2001)
Surface states and reactivity of pyrite and marcasite. Appl. Surf.
Sci. 179(1–4), 223–230.
Wei D. and | 👁 Image
| Xian, Haiyang, Wu, Xiao, Zhu, Jianxi, Du, Runxiang, Wei, Jingming, Zhu, Runliang, He, Hongping (2021) Environmental-sulfur-controlled surface properties of pyrite: a first principles PBE + U study. Physics and Chemistry of Minerals, 48 (5) doi:10.1007/s00269-021-01145-7 | Journal (article/letter/editorial) | | under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021
Abstract
The structure...spectroscopy
(Andersson et al. 2004; Leiro et al. 2003; Uhlig et al. 2001),
ultraviolet photoelectron spectroscopy...structure and relative stability of pyrite and marcasite: implications for
photovoltaic performance. Phys...https://doi.org/10.1103/
PhysRevB.83.235311
Uhlig I, Szargan R, Nesbitt HW, Laajalehto K (2001) Surface...Surface states and
reactivity of pyrite and marcasite. Appl Surf Sci 179:222–229.
https://doi.org/10 | 👁 Image
| | Journal (article/letter/editorial) | | has a structure similar to that
of pyrite and marcasite, with anionic dimer AsS2 instead of S22 and the...from the spectra of pyrite and isostructural marcasite, with the Fe L3/L2 ratio indicating
high-spin...synchrotron-based
S L2,3- and L1-edge XANES of pyrite and marcasite, and
associated changes of the spectra after oxidation...synchrotron radiation storage ring
BESSY II (Berlin, Germany). The spectra were recorded
in the total electron...from those of elemental sulphur, pyrite, and
marcasite (Kasrai et al. 1996; Todd et al. 2003) in the | 👁 Image
| | Journal (article/letter/editorial) | | the locality.
Binarite. An obsolete synonym of marcasite. Named, no doubt,
from the Latin hinarius, since...(Roscoe and Schorlemmer, 1878).
lPasernephrit. J. Uhlig, 1910. Neues Jahrb. Min., 1910, vol. ii,
p. 91....massive, dark lead-grey mineral occurring with marcasite, bismuthinite,
famatinite, and native gold in...Mineralogie,
1839, p. 321. An obsolete synonym of marcasite. • Named from H-OAUK,
grey, and pyrites; German... occurring in crevices in porphyry
at Terpitz, Saxony.
Thortveitite. J. Schetelig, 1911. Centralblatt | 👁 Image
| | Journal (article/letter/editorial) | | the locality. Binarite. An obsolete synonym of marcasite. Named, no doubt, from the Latin hinarius, since...(Roscoe and Schorlemmer, 1878). lPasernephrit. J. Uhlig, 1910. Neues Jahrb. Min., 1910, vol. ii, p. 91....massive, dark lead-grey mineral occurring with marcasite, bismuthinite, famatinite, and native gold in...Mineralogie, 1839, p. 321. An obsolete synonym of marcasite. Named from ~ro~&, grey, and pyrites ; German... occurring in crevices in porphyry at Terpitz, Saxony. Thortveitite. J. Schetelig, 1911. Centralblatt | 👁 Image
| | Journal (article/letter/editorial) | | 1998a; Rosso et al., 1999a; Rosso et al., 1999b; Uhlig et al.,
2001). In an earlier work, a mechanism for...pyrite. Geochim. Cosmochim. Acta 48, 2669 –2678.
Uhlig I., Szargan R., Nesbitt H. W., and Laajalehto K...(2001) Surface
states and reactivity of pyrite and marcasite. Appl. Surface Sci.
179(1– 4), 222–229.
Weerasooriya | 👁 Image
| | Journal (article/letter/editorial) | | phase has the same
oxidation state of bulk Fe in marcasite, arsenopyrite, and pyrite. The As 3d peak of loellingite...considerations; Fe of loellingite, arsenopyrite, and marcasite is divalent
(formally) rather than being trivalent...differences between loellingite, arsenopyrite, and marcasite resulted from
metal-metal interactions parallel...loellingite, trivalent in arsenopyrite, and divalent in marcasite. This was thought to be associated with substitution...distortions in arsenopyrite and loellingite
relative to marcasite result from metal-anion interactions, not
metal-metal | 👁 Image
| | Journal (article/letter/editorial) | | contained framboidal pyrite and altered pyrite/marcasite, which
is considered the main reason for the low...impurities in the
crystal structure [5]. The marcasite mineral (FeS2 ), the polymorph of pyrite, has...Pyrite has a simple cubic crystal structure, while marcasite, which has the same
chemical composition as pyrite...and mineralogical characteristics.
For example, marcasite (FeS2 ) is more reactive than pyrite and reacts...forms of
pyrite are described in the order of marcasite > framboidal pyrite > massive pyrite [13]. The | 👁 Image
| | Journal (issue) | | Rupnica near Voćin (Figure 1). Rupnica
is an old quarry with well-exposed phenomenon of columnar jointing...(Figure 2 left). Rupnica
(together with Trešnjevica Quarry, where
a magmatic vein several hundred metres
in...Papuk. The second
protected geological site is Quarry Fantazija
(Figure 2 right) near Rovinj (Figure...good practice
is Vinkuran (Figure 1), the oldest quarry
in Istria (Figure 3 left), known as “Cava
Romana”...heritage
Figure 3: (left) Vinkuran, the oldest quarry in Istria; (right) the Arena in Pula.
sequence | 👁 Image
| | Journal (article/letter/editorial) | | Technology, Brennhausgasse 14, D-09599, Freiberg, Germany
Abstract
Conical seamount is a submarine alkali...veins,
veinlets, and
disseminations
Pyrite ± marcasite
Illite/smectite, amorphous silica,
± chlorite...veins
and breccia matrix
Shallow: pyrite, ±
marcasite, arsenopyrite
Deep: pyrite ± sphalerite,
galena...Synmineralization
III
Late epithermal
veins
Pyrite, marcasite
Argillic/advanced argillic-kaolinite
± alunite...stages analyzed in this study. A. Stage 1 pyrite-marcasite replacing
magnetite, veinlets through altered | 👁 Image
| Nzulu, Gabriel K., Bakhit, Babak, Högberg, Hans, Hultman, Lars, Magnuson, Martin (2021) Elucidating Pathfinding Elements from the Kubi Gold Mine in Ghana. Minerals, 11 (9) 912 doi:10.3390/min11090912 | Journal (article/letter/editorial) | | sites [1,2]. Sulfide minerals such
as pyrite/marcasite (FeS2 ), arsenopyrite (FeAsS), pyrrhotite (Fe(1−x)...attributable to the marcasite (FeS2 ) or pyrite group of compounds [68]. According to Uhlig
et al. (2001),...Fe3+ states of the surface [69]. For the smaller marcasite peak, the higher BE (708.4 eV)
is due to the ...This higher BE (708.4 eV) and the lower BE for marcasite FeS2 is in close
agreement with the peak at (706...indicator minerals such as quartz, hematite, pyrite (marcasite),
garnet, and other occasional silicate minerals | 👁 Image
| Schaufuss, Andrea G., Nesbitt, H. Wayne, Scaini, Michael J., Hoechst, Hartmut, Bancroft, Michael G., Szargan, Rüdiger (2000) Reactivity of surface sites on fractured arsenopyrite (FeAsS) toward oxygen. American Mineralogist, 85 (11) 1754-1766 doi:10.2138/am-2000-11-1219 | Journal (article/letter/editorial) | | Universität Leipzig, Linnéstrasse 2, D-04103 Leipzig, Germany
2
Department of Earth Sciences, University of Western...structure (Fig. 1a) can be derived from
the marcasite structure. Marcasite (FeS2) contains molecular
pairs of...octahedrally surrounded by the anion
dimers. In the marcasite structure the cations and anionic dimers
are each...S3p states.
The essential difference between marcasite (arsenopyrite)
and pyrite structures is a splitting...destabilized and dx2–y2 is stabilized in the marcasite structure
which leads to a band gap decrease from |
|
