ETYMOLOGY OF THE WORD PYRRHOTITE
From Greek purrhotēs redness, from purrhos fiery, from pur fire.
10 ENGLISH BOOKS RELATING TO «PYRRHOTITE»
Discover the use of
pyrrhotite in the following bibliographical selection. Books relating to
pyrrhotite and brief extracts from same to provide context of its use in English literature.
1
Handbook of Flotation Reagents: Chemistry, Theory and ...
Pyrrhotite, FenSn1 (Fe, 60%; S, 40%; hardness, 3.5; specific gravity, 4.5). There
are two types of pyrrhotite commonly present in massive copper sulfide ores.
These are (a) hexagonal pyrrhotite, which in flotation behaves similar to altered ...
Srdjan M. Bulatovic, 2007
2
Froth Flotation: A Century of Innovation
The magnetic concentrate is reground and the primary copper-nickel concentrate
prepared from it is reground and recleaned with the addition of sodium amyl
xanthate (7 g/t), along with diethylenetriamine (12 g/t) to depress the pyrrhotite.
Maurice C. Fuerstenau, Graeme J. Jameson, Roe-Hoan Yoon, 2007
3
Geochemistry of Hydrothermal Ore Deposits
The former related pyrrhotite composition to the activity of Si gas and presented
the now familiar activity-1/T diagram (Figure 8.5a) that is used commonly to
correlate sulfide stabilities. They also established the convention of expressing ...
Hubert Lloyd Barnes, 1997
4
Hydrometallurgy 2008: Proceedings of the Sixth International ...
During pyrrhotite dissolution iron is dissolved and provides enough substrate for
bacterial growth (Rodríguez et al. 2001). Moreover, as elemental sulphur is also
produced during pyrrhotite dissolution (figure 4) it could act as a barrier for the ...
Courtney A. Young, Patrick R. Taylor, Corby G. Anderson, 2008
5
Geological Survey Professional Paper
pyrrhotite summari/ed by Misra and Fleet (1973, p. 530) allows an estimation of
the pyrrhotite composition before inversion if the relative amounts of hexagonal
and monoclinic phases are known. In figure 34, atomic percent of metals in ...
6
Progress in Metamorphic and Magmatic Petrology: A Memorial ...
The composition of pyrrhotite in assemblages with pyrite changes systematically
with temperature (increasing temperatures decrease the Fe:S ratio in pyrrhotite).
Assemblages of iron sulphides and oxides are common in deposits of iron ...
7
Encyclopedia of Geomagnetism and Paleomagnetism
(pyrrhotite and greigite) are intermediate mineral phases within the chemical iron
reduction series that eventually forms stable paramagnetic pyrite (FeS2; Berner,
1969, 1970, 1984; Canfield and Berner, 1987). The process can be mediated by
...
David Gubbins, Emilio Herrero-Bervera, 2007
8
Understanding Mineral Deposits
Kula Misra. log,o /Si = (70.03 - 85.83tfw) (1000 / T - 1) + 39.30 (1 - 0.9981^) -
11.91 (4.39) where fSi is the fugacity of sulfur relative to the ideal diatomic gas at
1 atm, ty^ is the mole fraction of FeS in pyrrhotite, and T is the temperature in
Kelvin.
9
Mine Planning and Equipment Selection 1995
The first phase of this research project evaluated the ferric phosphate coating
technology on pyrrhotite tailings samples. A series of pyrrhotite mini-columns and
large columns were treated with a coated solution composed of H202, KH2P04 ...
J. Hadjigeorgiou, A.K. Mehmotra, R. Poulin, 1995
10
Concrete and Its Chemical Behaviour
The presence of pyrite and pyrrhotite in aggregates is also reported to have
caused sulphate attack to concrete in Sweden.29 In one dam structure the
presence of up to 10% pyrrhotite in the aggregate resulted in extensive swelling
and ...
10 NEWS ITEMS WHICH INCLUDE THE TERM «PYRRHOTITE»
Find out what the national and international press are talking about and how the term
pyrrhotite is used in the context of the following news items.
Crumbling Foundations
We are aware of no project, not one, that has had the recently discovered phenomenon of pyrrhotite reaction and we have not been notified by either state ... «NBC Connecticut, Jul 15»
Des milliers de personnes marchent en soutien aux victimes de la …
Des milliers de personnes ont marché samedi matin à Trois-Rivières, en guise de soutien aux victimes de la pyrrhotite. Ils réclament une intervention rapide de ... «Radio-Canada, May 15»
Pyrrhotite: une grande marche de solidarité samedi
PYRRHOTITE. Devant le refus du gouvernement fédéral et de nombreuses villes et municipalités de la région à venir en aide aux victimes de la pyrrhotite, ... «L'Hebdo Journal, May 15»
Pyrrhotite: des victimes au bord du gouffre
Mme Roberge a récemment appris que les fondations de sa résidence contiennent un haut taux de pyrrhotite. Quelque temps avant cette nouvelle désastreuse, ... «LaPresse.ca, May 15»
Pyrrhotite: le candidat conservateur invité... à rester chez lui
(Trois-Rivières) La Coalition d'aide aux victimes de la pyrrhotite souhaite de tout coeur accueillir au moins 5000 personnes à la marche de solidarité qu'elle ... «LaPresse.ca, May 15»
Pyrrhotite: une autre guerre d'experts en vue
(Trois-Rivières) Les propriétaires de 94 de 149 maisons contenant de la pyrrhotite qui devaient être réparées dans la région, cet été, ont été avisés par leur ... «LaPresse.ca, May 15»
Solidarité dans le dossier de la pyrrhotite: «C'est une question de …
(SHAWINIGAN) Bien qu'il appuie moralement la Coalition d'aide aux victimes de la pyrrhotite, le maire de Shawinigan, Michel Angers, constate que cette ... «LaPresse.ca, Apr 15»
Demande d'aide pour la pyrrhotite: peu de réactions des municipalités
(TROIS-RIVIÈRES) La Coalition d'aide aux victimes de la pyrrhotite a placé, les 5 et 6 janvier derniers, une demande de soutien financier auprès de huit ... «LaPresse.ca, Apr 15»
Pyrrhotite: un non définitif d'Ottawa
(Trois-Rivières) La Coalition d'aide aux victimes de la pyrrhotite a essuyé un non, cette fois définitif, de la part du gouvernement Harper, en réponse à la ... «LaPresse.ca, Apr 15»
Tour de l'horloge: faire disparaître la pyrrhotite sans soulever le …
Dans la région, il s'agirait des premiers travaux majeurs en sous-oeuvre reliés à la pyrrhotite, c'est-à-dire qu'il n'est pas nécessaire de soulever l'édifice pour ... «LaPresse.ca, Mar 15»
