{"title":"Gesso","description":"\u003cp data-start=\"0\" data-end=\"310\"\u003eIl \u003cstrong data-start=\"3\" data-end=\"12\"\u003egesso\u003c\/strong\u003e è un minerale comune composto da \u003cstrong data-start=\"47\" data-end=\"77\"\u003esolfato di calcio idrato\u003c\/strong\u003e, con formula chimica \u003cstrong data-start=\"99\" data-end=\"113\"\u003eCaSO₄·2H₂O\u003c\/strong\u003e. È un minerale tenero (durezza 2 sulla scala di Mohs), spesso bianco o trasparente, ma può anche presentare tonalità grigie, rosa o giallastre a seconda delle impurità contenute.\u003c\/p\u003e\n\u003ch3 data-start=\"312\" data-end=\"346\"\u003eCaratteristiche principali:\u003c\/h3\u003e\n\u003cul data-start=\"347\" data-end=\"579\"\u003e\n\n\u003cli data-start=\"347\" data-end=\"395\"\u003e\n\n\u003cp data-start=\"349\" data-end=\"395\"\u003e\u003cstrong data-start=\"349\" data-end=\"364\"\u003eComposizione\u003c\/strong\u003e: solfato di calcio diidrato\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"396\" data-end=\"445\"\u003e\n\n\u003cp data-start=\"398\" data-end=\"445\"\u003e\u003cstrong data-start=\"398\" data-end=\"408\"\u003eDurezza\u003c\/strong\u003e: 2 (può essere graffiato con l’unghia)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"446\" data-end=\"469\"\u003e\n\n\u003cp data-start=\"448\" data-end=\"469\"\u003e\u003cstrong data-start=\"448\" data-end=\"459\"\u003eClivaggio\u003c\/strong\u003e: perfetto\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"470\" data-end=\"503\"\u003e\n\n\u003cp data-start=\"472\" data-end=\"503\"\u003e\u003cstrong data-start=\"472\" data-end=\"483\"\u003eDensità\u003c\/strong\u003e: circa 2,3 g\/cm³\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"504\" data-end=\"579\"\u003e\n\n\u003cp data-start=\"506\" data-end=\"579\"\u003e\u003cstrong data-start=\"506\" data-end=\"516\"\u003eAspetto\u003c\/strong\u003e: cristalli tabulari, masse fibrose o forme granulari\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 data-start=\"581\" data-end=\"603\"\u003eForme comuni:\u003c\/h3\u003e\n\u003cul data-start=\"604\" data-end=\"887\"\u003e\n\n\u003cli data-start=\"604\" data-end=\"663\"\u003e\n\n\u003cp data-start=\"606\" data-end=\"663\"\u003e\u003cstrong data-start=\"606\" data-end=\"618\"\u003eSelenite\u003c\/strong\u003e: gesso trasparente, in cristalli ben formati\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"664\" data-end=\"720\"\u003e\n\n\u003cp data-start=\"666\" data-end=\"720\"\u003e\u003cstrong data-start=\"666\" data-end=\"677\"\u003eAlabastro\u003c\/strong\u003e: gesso bianco massiccio, utilizzato in scultura\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"721\" data-end=\"795\"\u003e\n\n\u003cp data-start=\"723\" data-end=\"795\"\u003e\u003cstrong data-start=\"723\" data-end=\"740\"\u003eGesso fibroso\u003c\/strong\u003e: talvolta chiamato \"spaghetti stone\" o \"capelli d’angelo\"\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"796\" data-end=\"887\"\u003e\n\n\u003cp data-start=\"798\" data-end=\"887\"\u003e\u003cstrong data-start=\"798\" data-end=\"818\"\u003eRose dei deserti\u003c\/strong\u003e: formazioni a rosetta che si trovano nelle regioni desertiche\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003chr data-start=\"889\" data-end=\"892\"\u003e\n\u003ch3 data-start=\"894\" data-end=\"907\"\u003eOrigine:\u003c\/h3\u003e\n\u003cp data-start=\"908\" data-end=\"1111\"\u003eIl gesso si forma principalmente per \u003cstrong data-start=\"945\" data-end=\"969\"\u003eevaporazione dell’acqua\u003c\/strong\u003e in ambienti marini poco profondi o laghi salati. È un \u003cstrong data-start=\"1035\" data-end=\"1059\"\u003eminerale evaporitico\u003c\/strong\u003e. È spesso associato a rocce sedimentarie.\u003c\/p\u003e\n\u003chr data-start=\"1113\" data-end=\"1116\"\u003e\n\u003ch3 data-start=\"1118\" data-end=\"1136\"\u003eUtilizzi:\u003c\/h3\u003e\n\u003cul data-start=\"1137\" data-end=\"1595\"\u003e\n\n\u003cli data-start=\"1137\" data-end=\"1329\"\u003e\n\n\u003cp data-start=\"1139\" data-end=\"1329\"\u003e\u003cstrong data-start=\"1139\" data-end=\"1162\"\u003eIndustria del gesso\u003c\/strong\u003e: quando il gesso viene riscaldato a circa 150 °C, perde acqua e diventa \u003cstrong data-start=\"1242\" data-end=\"1261\"\u003egesso di Parigi\u003c\/strong\u003e (CaSO₄·½H₂O). Aggiungendo acqua si ottiene una pasta che indurisce.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1330\" data-end=\"1413\"\u003e\n\n\u003cp data-start=\"1332\" data-end=\"1413\"\u003e\u003cstrong data-start=\"1332\" data-end=\"1348\"\u003eEdilizia\u003c\/strong\u003e: pareti divisorie in lastre di gesso (tipo \u003cstrong data-start=\"1387\" data-end=\"1396\"\u003eplaco\u003c\/strong\u003e, \u003cstrong data-start=\"1398\" data-end=\"1406\"\u003eBA13\u003c\/strong\u003e, ecc.)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1414\" data-end=\"1473\"\u003e\n\n\u003cp data-start=\"1416\" data-end=\"1473\"\u003e\u003cstrong data-start=\"1416\" data-end=\"1431\"\u003eAgricoltura\u003c\/strong\u003e: ammendante per terreni acidi o compattati\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1474\" data-end=\"1524\"\u003e\n\n\u003cp data-start=\"1476\" data-end=\"1524\"\u003e\u003cstrong data-start=\"1476\" data-end=\"1502\"\u003eScultura e artigianato\u003c\/strong\u003e: in particolare l’alabastro\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1525\" data-end=\"1595\"\u003e\n\n\u003cp data-start=\"1527\" data-end=\"1595\"\u003e\u003cstrong data-start=\"1527\" data-end=\"1538\"\u003eMedicina\u003c\/strong\u003e: in passato utilizzato per stampi e bendaggi\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003chr data-start=\"1597\" data-end=\"1600\"\u003e\n\u003ch3 data-start=\"1602\" data-end=\"1626\"\u003eCuriosità:\u003c\/h3\u003e\n\u003cul data-start=\"1627\" data-end=\"1985\"\u003e\n\n\u003cli data-start=\"1627\" data-end=\"1750\"\u003e\n\n\u003cp data-start=\"1629\" data-end=\"1750\"\u003eIl gesso è uno dei primi minerali utilizzati dall’uomo nell’edilizia, fin dall’antichità (Egitto, Mesopotamia).\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1751\" data-end=\"1837\"\u003e\n\n\u003cp data-start=\"1753\" data-end=\"1837\"\u003eIn geologia è un indicatore dell’\u003cstrong data-start=\"1778\" data-end=\"1819\"\u003eevaporazione di antichi ambienti acquosi\u003c\/strong\u003e.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli data-start=\"1838\" data-end=\"1985\"\u003e\n\n\u003cp data-start=\"1840\" data-end=\"1985\"\u003eSi trova spesso in \u003cstrong data-start=\"1871\" data-end=\"1900\"\u003egiacimenti molto estesi\u003c\/strong\u003e, in particolare in Francia (un tempo a Montmartre), in Marocco, in Canada o negli Stati Uniti.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","products":[],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0808\/8577\/6732\/collections\/gypse-6515017.jpg?v=1779712244","url":"https:\/\/www.laboiteacailloux.com\/it\/collections\/gypse.oembed","provider":"La Boite à Cailloux","version":"1.0","type":"link"}