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POLLUX [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-09-01

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
DEF

A more or less continuous, luminous electrical discharge of weak or moderate intensity in the atmosphere, emanating from elevated objects at the Earth’s surface (lightning conductors, wind vanes, masts of ships) or from aircraft in flight (wing tips, propellers, etc.).

CONT

St. Elmo’s fire ... occurs from objects, especially pointed ones, when the electrical field strength near their surfaces attains a value near 1000 volts per centimeter. It often occurs during stormy weather and might be seen on a ship’s mast or yardarm, aircraft, lightning rods, and steeples.

OBS

Saint Elmo's fire... A single flame is called a Helena, or a Corposant; a double, or twin, flame is called a Castor and Pollux, or a double Corposant. It takes its name from St. Elmo, the patron saint of sailors.

OBS

corposant: Portuguese and obsolete Spanish corpo santo, both from Latin corpus snctum, holy body : corpus, body ...

OBS

St. Elmo’s fire: usually bluish or greenish in colour, sometimes white or violet.

OBS

St Elmo’s fire is thought to be a form of corona discharge caused by the high electrical potential in a thunderstorm.

OBS

In consulted sources, most often than not, Saint Elmo’s fire and corona discharge are considered as synonyms. However, some sources, define Saint Elmo’s fire as a form of corona discharge. Saint Elmo’s fire occurred during bad weather (thunderstorm, etc.). Corona discharge occurred when very strong electrical field develops. "When this luminous effect occurs on or near power lines, it is known as corona discharge, a phenomenon similar to Saint Elmo’s Fire. Sometimes this ionized air detaches itself from the lines and moves about independently of them." [<a href="http://www.saviour-of-all.org/UFO2.html" title="http://www.saviour-of-all.org/UFO2.html">http://www.saviour-of-all.org/UFO2.html</a>]

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
DEF

Décharge électrique lumineuse dans l'atmosphère; cette décharge, plus ou moins continue et d'intensité faible ou modérée, émane soit d'objets élevés situés à la surface du globe (paratonnerres, appareils anémométriques, mâts de navires, etc.), soit d'aéronefs en vol (bouts d'ailes, hélices, etc.).

CONT

feu Saint-Elme. [...] Sous forme de panaches, ou bien d'aigrettes violettes ou verdâtres, nettement visible la nuit, ce phénomène s'observe lorsque le champ électrique devient intense au voisinage de la surface des objets.

CONT

L'éclair est annoncé parfois par des phénomènes lumineux qui apparaissent à l'extrémité des mâts de navire, aux angles des maisons, ou aux pics des montagnes. Dans un air fortement chargé d'électricité, de petites flammes bleues jaillissent autour de ces points particulièrement exposés. Ce sont des «feux Saint-Elme», du nom de l'évêque italien du début du IVe siècle, devenu patron des navigateurs.

OBS

Le feu Saint-Elme. On le nommait aussi : feu de saint Nicolas ou feu de sainte Anne, divinités favorables aux marins. Actuellement, il est surtout connu sous le nom de feu Saint-Elme.

Spanish

Campo(s) temático(s)
  • Fenómenos meteorológicos, climáticos y atmosféricos
DEF

Descarga eléctrica luminosa que se observa en la atmósfera, más o menos continua y de intensidad ligera o moderada, emitida por objetos elevados situados en la superficie terrestre (pararrayos, anemómetros, mástiles de buques, etc.) o en aeronaves en vuelo (extremos de las alas, hélices, etc.).

Save record 1

Record 2 2010-12-20

English

Subject field(s)
  • Mineralogy
Universal entry(ies)
(Cs,Na)2(Al2Si4)O12•H2O
formula, see observation
DEF

A colorless, transparent, zeolite mineral [occurring] massive or in cubes, and ... used as a gemstone.

CONT

The Tanco pegmatite ... contains the largest known concentration of pollucite.

OBS

Chemical formula: (Cs,Na)2(Al2Si4)O12•H2O

French

Domaine(s)
  • Minéralogie
Entrée(s) universelle(s)
(Cs,Na)2(Al2Si4)O12•H2O
formula, see observation
DEF

Minéral (tectosilicate de césium) du système cristallin cubique, incolore, du groupe des zéolites.

CONT

[...] la pegmatite de Tanco contient la plus vaste concentration connue de pollucite.

OBS

Étymologie : Allusion au fait que, dans l'Antiquité, Pollux, frère de Castor, accompagnait toujours celui-ci (la pollucite a été découverte à l'île d'Elbe avec la castorite (Castor), maintenant appelée pétalite).

OBS

Formule chimique : (Cs,Na)2(Al2Si4)O12•H2O

Spanish

Campo(s) temático(s)
  • Mineralogía
Entrada(s) universal(es)
(Cs,Na)2(Al2Si4)O12•H2O
formula, see observation
Save record 2

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