{"id":114391,"date":"2022-02-05T00:30:27","date_gmt":"2022-02-04T23:30:27","guid":{"rendered":"https:\/\/material-properties.org\/iode-et-cesium-comparaison-proprietes\/"},"modified":"2022-03-22T11:37:24","modified_gmt":"2022-03-22T10:37:24","slug":"iode-et-cesium-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/iode-et-cesium-comparaison-proprietes\/","title":{"rendered":"Iode et C\u00e9sium – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques de l’iode et du c\u00e9sium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Iode vs C\u00e9sium.<\/em><\/p>\n

\"iode<\/p>\n

\n
<\/span>Comparer l'iode avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Chlore<\/a><\/p>\n

\"S\u00e9l\u00e9nium<\/a><\/p>\n

\"Brome<\/a><\/p>\n

\"Rubidium<\/a><\/p>\n

\"Strontium<\/a><\/p>\n

\"Mercure<\/a><\/p>\n

\"C\u00e9sium<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

\n
<\/span>Comparer le c\u00e9sium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Chlore<\/a><\/p>\n

\"Rubidium<\/a><\/p>\n

\"Iode<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

<\/div>\n
\n

Iode et C\u00e9sium – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Iode<\/h3>\n

L’iode est le plus lourd des halog\u00e8nes stables, il existe sous la forme d’un solide m\u00e9tallique brillant, violet-noir dans des conditions standard qui se sublime facilement pour former un gaz violet.\u00a0L’iode est le moins abondant des halog\u00e8nes stables, \u00e9tant le soixante et uni\u00e8me \u00e9l\u00e9ment le plus abondant.\u00a0Elle est encore moins abondante que les terres dites rares.\u00a0C’est le nutriment min\u00e9ral essentiel le plus lourd.<\/p>\n<\/div>

<\/div><\/div>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

C\u00e9sium<\/h3>\n

Le c\u00e9sium est un m\u00e9tal alcalin doux et argent\u00e9 avec un point de fusion de 28,5\u00b0C, ce qui en fait l’un des cinq seuls m\u00e9taux \u00e9l\u00e9mentaires liquides \u00e0 ou pr\u00e8s de la temp\u00e9rature ambiante. Le c\u00e9sium a des propri\u00e9t\u00e9s physiques et chimiques similaires \u00e0 celles du rubidium et du potassium.<\/p>\n<\/div>

<\/div><\/div>\n<\/div><\/div>\n
<\/div>\n
\n

\"Iode<\/p>\n<\/div><\/div>\n

\n

\"C\u00e9sium<\/p>\n

<\/p><\/div><\/div>\n

Source : www.luciteria.com<\/p>\n

<\/div>\n
\n

Iode et C\u00e9sium – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

Iode<\/a><\/h3>\n

En plus des produits nutritionnels, l’iode et les d\u00e9riv\u00e9s d’iode sont utilis\u00e9s dans un large \u00e9ventail d’applications m\u00e9dicales, agricoles et industrielles.\u00a0Environ la moiti\u00e9 de tout l’iode produit entre dans divers compos\u00e9s organoiod\u00e9s, 15% restants restent sous forme d’\u00e9l\u00e9ment pur, 15% suppl\u00e9mentaires sont utilis\u00e9s pour former de l’iodure de potassium et 15% suppl\u00e9mentaires pour d’autres compos\u00e9s iod\u00e9s inorganiques.\u00a0L’application principale est la production de produits de contraste pour rayons X (22 %).\u00a0Le num\u00e9ro atomique et la densit\u00e9 \u00e9lev\u00e9s de l’iode le rendent parfaitement adapt\u00e9 \u00e0 cette application, car sa pr\u00e9sence dans le corps peut aider \u00e0 augmenter le contraste entre les tissus, les organes et les vaisseaux sanguins avec des densit\u00e9s de rayons X similaires.\u00a0Il est utilis\u00e9 comme antiseptique pour les plaies externes.\u00a0Une autre application \u00e0 l’origine de la demande d’iode est le film polarisant dans les \u00e9crans \u00e0 cristaux liquides (LCD).<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

C\u00e9sium<\/a><\/h3>\n

La plus grande utilisation actuelle de c\u00e9sium non radioactif est dans les fluides de forage au formiate de c\u00e9sium pour l’industrie p\u00e9troli\u00e8re extractive.\u00a0Ils sont \u00e9galement utilis\u00e9s pour fabriquer du verre optique sp\u00e9cial, comme promoteur de catalyseur, dans des tubes \u00e0 vide et dans des \u00e9quipements de surveillance des rayonnements.\u00a0L’une de ses utilisations les plus importantes est dans \u00abl’horloge au c\u00e9sium\u00bb (horloge atomique).\u00a0Ces horloges sont un \u00e9l\u00e9ment essentiel des r\u00e9seaux Internet et de t\u00e9l\u00e9phonie mobile, ainsi que des satellites du syst\u00e8me de positionnement global (GPS).\u00a0Le c\u00e9sium-137 est un radio-isotope couramment utilis\u00e9 comme \u00e9metteur gamma dans les applications industrielles.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

Iode et C\u00e9sium – Comparaison dans le tableau<\/h2>\n<\/div><\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00c9l\u00e9ment<\/td>\nIode<\/b><\/td>\nC\u00e9sium<\/b><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n4,94 g\/cm<\/strong><\/td>\n1,879g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Limite d’\u00e9lasticit\u00e9<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Module de Young<\/td>\nN \/ A<\/strong><\/td>\n1,7 GPa<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\nN \/ A<\/strong><\/td>\n0,2<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\nN \/ A<\/strong><\/td>\n0,14 MPa<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n113,5\u00a0\u00b0C<\/strong><\/td>\n28,4 \u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n184 \u00b0C<\/strong><\/td>\n669\u00a0\u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n0,449 W\/mK<\/strong><\/td>\n36W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\nN \/ A<\/strong><\/td>\n97 \u00b5m\/mK<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n0,214 J\/g\u00b7K<\/span><\/strong><\/td>\n0,24 J\/g\u00b7K<\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n7,824 kJ\/mol<\/strong><\/td>\n2,092 kJ\/mole<\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n20,752 kJ\/mole<\/span><\/strong><\/td>\n67,74 kJ\/mole<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques de l’iode et du c\u00e9sium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Iode vs C\u00e9sium. Source : www.luciteria.com<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"yoast_head":"\nIode et C\u00e9sium - Comparaison - Propri\u00e9t\u00e9s - Material Properties<\/title>\n<meta name=\"description\" content=\"Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques de l'iode et du c\u00e9sium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. 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