Accueil > Dictionnaire > Définitions du mot « sanidine »
Sanidine
[sanidin]
Définitions de « sanidine »
Sanidine - Nom commun
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(Minéralogie) Minéral du groupe des silicates, appartenant au sous-groupe des tectosilicates et à la famille des feldspaths, plus précisément aux feldspaths potassiques (K-Feldspath), de formule chimique KAlSi3O8.
Dans les entrailles de la terre, invisibles à l'œil nu, se cachent des trésors géologiques comme la sanidine, ce silicate aux nuances de feldspath potassique, dont la formule chimique KAlSi3O8 révèle toute la complexité.
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Étymologie de « sanidine »
Mot inventé en 1808 par le minéralogiste Karl Wilhelm Nose. Du grec ancien, composé de σανίδα, sanida (« planche ») et de εἶδος, eidos (« aspect »), littéralement « à l'aspect de planche », en allusion à la forme tabulaire de ses cristaux.Usage du mot « sanidine »
Évolution historique de l’usage du mot « sanidine » depuis 1800
Synonymes de « sanidine »
Citations contenant le mot « sanidine »
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Much of our understanding of Yellowstone’s dynamic history is due to geochronologic studies that utilize a millimeter sized, white mineral called sanidine found within the rhyolites of Yellowstone. Sanidine has the ability to record when an eruption occurred due to its high concentration of the element potassium (“K” in the periodic table of elements), which allows scientists to use a technique based on the radioactive decay of potassium to argon (don’t worry, it is very slow and not dangerous).
Billings Gazette — Caldera chronicles: Small crystals record Yellowstone’s volcanic past -
“Using sanidine dating and magnetostratigraphy – a geophysical correlation technique to date sedimentary and volcanic sequences – we’ve narrowed the timing of integration of the lower Colorado River with the evolving Gulf of California to between 4.6-4.8 million years ago,” says Jänecke, professor in USU’s Department of Geosciences and a GSA Fellow.
River Arrival: USU Geologist Explores When the Colorado Met the Sea of Cortez -
The concordance of our new 7.0 ± 0.9 ka ZDD eruption age with the 7370 ± 30 cal yr BP from the burnt branch at the base of the QXZ lava and our sanidine 40Ar/39Ar ages connotes that the true eruption age of the QXZ is indeed < 8 ka, and we thus revise the age of the QXZ to 7.0 ± 0.9 ka.
Nature — The Qixiangzhan eruption, Changbaishan-Tianchi volcano, China/DPRK: new age constraints and their implications | Scientific Reports -
On the outside, the facelifted SUV Tourer is distinguishable by the new bodykit at the front and rear, circular fog lamps and 18-inch light-alloy wheels for all V6 versions. The top-of-the-range R500 4MATIC is fitted with 19-inch wheels. R-Class customers can also choose from three new paint colours: calcite white, sanidine beige or periclase green.
Motor Authority — Mercedes R-class facelifted
Traductions du mot « sanidine »
| Langue | Traduction |
|---|---|
| Anglais | sanidine |
| Espagnol | sanidina |
| Italien | sanidine |
| Allemand | sanidin |
| Chinois | 沙丁胺 |
| Arabe | ساندين |
| Portugais | sanidina |
| Russe | санидин |
| Japonais | サニジン |
| Basque | sanidine |
| Corse | sanidine |