CHE SIGNIFICA PYROXENE IN INGLESE
pirosseno
I piroxeni sono un gruppo di importanti minerali inosilici di roccia che si trovano in molte rocce ignee e metamorfiche. Essi condividono una struttura comune costituita da catene singole di tetraedra di silice e cristallizzano nei sistemi monoclinici e ortorombici. I piroxeni hanno la formula generale XY (Si, Al) 206 (dove X rappresenta calcio, sodio, ferro + 2 e magnesio e più raramente zinco, manganese e litio e Y rappresenta ioni di dimensioni minori, come cromo, alluminio, ferro + 3 , Magnesio, manganese, scandium, titanio, vanadio e anche ferro + 2). Sebbene l'alluminio sostituisca ampiamente per il silicio in silicati come i feldspars e gli anfiboli, la sostituzione avviene solo in misura limitata nella maggior parte dei pirosseni. Il nome piroxeno deriva dalle parole greche per fuoco (πυρ) e straniero (ξένος). I piroxeni sono stati chiamati in questo modo a causa della loro presenza in lavagne vulcaniche, dove talvolta si vedono come cristalli incorporati in vetro vulcanico; Si supponeva che fossero impurità nel bicchiere, quindi il nome "sconosciuti fuoco". Tuttavia, sono semplicemente minerali che formano presto, che si sono cristallizzati prima che la lava scoppiasse.
definizione di pyroxene nel dizionario inglese
La definizione di pirosseno nel dizionario è qualsiasi di un gruppo di minerali di silicato aventi la formula generale ABSi2O6, dove A è solitamente calcio, sodio, magnesio o ferro, e B è solitamente magnesio, ferro, cromo, manganese o alluminio. I pirosseni si trovano nelle rocce ignee di base e in alcune rocce metamorfiche e hanno colori che variano dal bianco al verde scuro o al nero. Possono essere monoclinici o ortorombici nella struttura cristallina. Esempi sono augite, diopside, enstatite, hypersthene e giadeite.
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10 LIBRI IN INGLESE ASSOCIATI CON «PYROXENE»
Scopri l'uso di
pyroxene nella seguente selezione bibliografica. Libri associati con
pyroxene e piccoli estratti per contestualizzare il loro uso nella letteratura.
THE. PYROXENE. GROUP. Pyroxene is a group of minerals, each made of a
different molecule, but arranged in the same way: long chains. The chain
structure is what makes a mineral belong to the “pyroxene group.” ...
Figure 4-11 (a) The liquidus surface of the pyroxene system has several phases
other than pyroxene. Olivine is the first phase to crystallize from liquids with
compositions close to enstatite, and a silica mineral crystallizes from liquids close
to ...
Alexander R. McBirney,
2007
3
An Introduction to Mineral Sciences
Model pyroxene structures as I-beams Having come to the end of the description
of the pyroxene structures we return, briefly, to the beginning. Part of
understanding any complex structure and its relationship with other structures is
in the way ...
4
Geological Studies in the Klamath Mountains Province, ...
... 93OMB247 40 53 22 123 26 50 Biotite-bearing pyroxene monzodiorite Dioritic
dike Quartz- and biotite-bearing three-pyroxene monzodiorite Biotite-bearing
three-pyroxene monzodiorite; mafic enclave Biotite-bearing three-pyroxene
gabbro; ...
Arthur W. Snoke, Calvin G. Barnes,
2006
5
On hypersthene-andesite and on triclinic
pyroxene in augitic ...
EHOMBIC PYROXENE IN AUGITE ANDESITES. 33 with that which is regarded
as probable hypersthene in the above rocks. The two exceptions (Mic. Nos. 514
and 515) are basaltic in habitus and carry olivine. PREVIOUS OBSERVATIONS ...
Whitman Cross, Samuel Franklin Emmons,
1884
... through basic alkaline rocks, ijolite. jacipurangite and melteigite, to ultrabasic
alkaline rocks such as damkjernite, in which associated phases include olivine,
pyroxene, spinel and perovskite. Many occurencies of nepheline in alkaline rocks
...
William Alexander Deer, Robert Andrew Howie,
2004
7
New Zealand Journal of Geology and Geophysics
prehnite. The matrix consists of chlorite and fine grained quartz. Hydro- grossular
occurs as turbid isotropic masses. Towards the contact there is a change from
greywacke to spilite. Here the fibrous pyroxene occurs in larger prisms up to 5
mm ...
8
Intraplate Volcanism in Eastern Australia and New Zealand
5.3.7B). Relatively few samples are known to contain more magnesian
compositions. The second pyroxene assemblage is characterised by
ferrohypersthene-eulite (FS50-7,), normally not co-existing with either ferroaugite
-ferro- hedenbergite ...
R. Wally Johnson, Jan Knutson, Stuart Ross Taylor,
1989
9
The Encyclopedia of the Solid Earth Sciences
Table P3 Pyroxene minerals. The major pyroxene groups. (From Morirnotov 1988
.) General formula: A1 p(B,C), .pTgOé Ca—Mg— Fe? ' pyroxenes The end
member compositions for this group are: M928506 (enstatite); Fe2Si2O6 (
terrosilite): ...
10
United States Geological Survey Professional Paper
the figure are clearly explicable as having resulted from unequal rates of growth
of two different pyroxene crystals growing from contiguous spherulitic centers;
had the mineral whose cross section is shown been other than pyroxene,
however, ...
10 NOTIZIE DOVE SI INCLUDE IL TERMINE «PYROXENE»
Vedi di che si parla nei media nazionali e internazionali e come viene utilizzato il termine ino
pyroxene nel contesto delle seguenti notizie.
Methane found trapped in Mars meteorites
The minerals the rocks were made of — olivine and pyroxene — would have reacted with water to release hydrogen gas. In theory, that hydrogen could react ... «CBC.ca, giu 15»
See Icarus Wing By Earth This Week
Reflectance spectra place Icarus among the relatively rare Q-class inner belt asteroids with a composition of olivine, pyroxene, and iron-nickel — a good match ... «Sky & Telescope, giu 15»
Scientists Detect Large Deposits of Impact Glass on Mars
Using spectral mixture modeling, the researchers found that glass is in fact present in these units, mixed with other minerals like olivine and pyroxene. «Sci-News.com, giu 15»
Quenched glasses, asteroid impacts, and ancient life on Mars
Using spectral mixture modeling, they found that glass is in fact present in these units, mixed with other minerals like olivine and pyroxene. This modeling ... «Science Codex, giu 15»
VOLCANO WATCH: Comparing Lava Flows
At lower temperatures, below 1150 degrees Celsius (2102 degrees Fahrenheit), the minerals pyroxene and plagioclase also crystallize along with olivine. «Big Island Now, apr 15»
Beautiful meteorites hold clues to solar system's violent start
Ureilites are made up of olivine and pyroxene (elements containing different levels of magnesium and iron), and carbon―all things also found on Earth. Ureilites ... «Smithsonian Science News, mar 15»
Africa's first nano computer tomography scanner opens the way for …
Peridotite is a dense, coarse-grained igneous rock comprising olivine and pyroxene minerals and eclogite is a metamorphic rock comprising pyroxene ... «Creamer Media's Mining Weekly, feb 15»
What Asteroid 2004 BL86 and Hawaii Have in Common
Among the colors are occasional empty spaces or what astronomers call absorption lines, where minerals such as olivine, pyroxene and plagioclase on the ... «Universe Today, gen 15»
Strange Rock from Russia Contains 30000 Diamonds
The rest of the rock is speckled with larger crystals of red garnet, and green olivine and pyroxene. Minerals called sulfides round out the mix. A 3D model built ... «Live Science, dic 14»
Feature: A castaway from ancient Mars
Dark, angular crystals of pyroxene floated alongside white, chunky feldspars. Large, faint pebbles sat next to tiny, dark beads. It was evocative of the lunar ... «Science Now, nov 14»