{"id":114447,"date":"2022-02-07T02:50:49","date_gmt":"2022-02-07T01:50:49","guid":{"rendered":"https:\/\/material-properties.org\/selenium-et-iode-comparaison-proprietes\/"},"modified":"2022-03-23T07:54:00","modified_gmt":"2022-03-23T06:54:00","slug":"selenium-et-iode-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/selenium-et-iode-comparaison-proprietes\/","title":{"rendered":"S\u00e9l\u00e9nium et Iode – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du s\u00e9l\u00e9nium et de l’iode, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0S\u00e9l\u00e9nium vs Iode.<\/em><\/p>\n

\"s\u00e9l\u00e9nium<\/p>\n

\n
<\/span>Comparer le s\u00e9l\u00e9nium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

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

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

<\/div>\n
\n

S\u00e9l\u00e9nium et Iode – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

S\u00e9l\u00e9nium<\/h3>\n

Le s\u00e9l\u00e9nium est un non-m\u00e9tal avec des propri\u00e9t\u00e9s interm\u00e9diaires entre les \u00e9l\u00e9ments ci-dessus et ci-dessous dans le tableau p\u00e9riodique, le soufre et le tellure, et pr\u00e9sente \u00e9galement des similitudes avec l’arsenic.\u00a0Il se produit rarement dans son \u00e9tat \u00e9l\u00e9mentaire ou sous forme de compos\u00e9s de minerai pur dans la cro\u00fbte terrestre.
\n<\/p><\/div>

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

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

\n

\"Iode<\/p>\n

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

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

<\/div>\n
\n

S\u00e9l\u00e9nium et Iode – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

S\u00e9l\u00e9nium<\/a><\/h3>\n

Les principales utilisations commerciales du s\u00e9l\u00e9nium aujourd’hui sont la fabrication du verre et les pigments.\u00a0Le s\u00e9l\u00e9nium trouve des applications dans diverses industries, par exemple, les applications de cellules solaires et de photoconducteurs, l’\u00e9lectrolyse du mangan\u00e8se, la protection contre les surtensions en courant continu ou la cristallographie aux rayons X.<\/p>\n<\/div><\/div>\n<\/div><\/div>\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

S\u00e9l\u00e9nium et Iode – 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>\nS\u00e9l\u00e9nium<\/b><\/td>\nIode<\/b><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n4,819 g\/cm3<\/strong><\/td>\n4,94 g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\n300 MPa<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Limite d’\u00e9lasticit\u00e9<\/td>\n150 MPa<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Module d’\u00e9lasticit\u00e9 de Young<\/td>\n10 GPa<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\n2<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\n740 MPa<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n221\u00b0C<\/strong><\/td>\n113,5\u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n685\u00b0C<\/strong><\/td>\n184\u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n2,04 W\/mK<\/strong><\/td>\n0,449 W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\n37 \u00b5m\/mK<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n0,32 J\/g\u00b7K<\/span><\/strong><\/td>\n0,214 J\/g\u00b7K<\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n6,694 kJ\/mol<\/strong><\/td>\n7,824 kJ\/mol<\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n37,7 kJ\/mole<\/span><\/strong><\/td>\n20,752 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 du s\u00e9l\u00e9nium et de l’iode, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0S\u00e9l\u00e9nium vs Iode. 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":"\nS\u00e9l\u00e9nium et Iode - 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 du s\u00e9l\u00e9nium et de l'iode, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. 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