ETIMOLOGIA DELLA PAROLA PYRRHOTITE
From Greek purrhotēs redness, from purrhos fiery, from pur fire.
PAROLE IN INGLESE ASSOCIATE CON «PYRRHOTITE»
pyrrhotite
uses
oxidation
metaphysical
properties
nickel
magnetism
trois
rivières
formation
pyrrhotite
unusual
iron
sulfide
mineral
with
variable
content
endmember
known
troilite
also
called
magnetic
pyrite
data
click
here
larger
image
browser
window
comments
lustrous
sharp
crystals
size
minor
sphalerite
information
group
found
pentlandite
basic
igneous
rocks
veins
metamorphic
often
marcasite
gallery
some
characteristics
first
formula
amount
sulfur
does
vary
roughly
atoms
monosulfide
unlike
which
disulfide
chemical
should
composition
crystal
structures
mintek
common
poorly
understood
johan
villiers
department
materials
science
metallurgical
engineering
university
pretoria
merriam
webster
bronze
colored
metallic
luster
that
consists
ferrous
attracted
magnet
origin
modification
german
pyrrhotin
define
approximately
partial
absence
ions
occurring
massive
forms
dolomite
encyclopedia
britannica
most
minerals
brassy
yellow
fool
gold
10 LIBRI IN INGLESE ASSOCIATI CON «PYRRHOTITE»
Scopri l'uso di
pyrrhotite nella seguente selezione bibliografica. Libri associati con
pyrrhotite e piccoli estratti per contestualizzare il loro uso nella letteratura.
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 NOTIZIE DOVE SI INCLUDE IL TERMINE «PYRRHOTITE»
Vedi di che si parla nei media nazionali e internazionali e come viene utilizzato il termine ino
pyrrhotite nel contesto delle seguenti notizie.
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, lug 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, mag 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, mag 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, mag 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, mag 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, mag 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»
