Gips
| gips | |
|---|---|
Gips | |
| Općenito | |
| Kategorija | sulfatni minerali |
| Hemijska formula | CaSO4·2H2O |
| Identifikacija | |
| Kristalni habitus | masivan, prizmatičan |
| Kristalni sistem | monoklinski |
| Tvrdoća | 2 |
| Sjaj | staklast do svilenkast, voštan |
| Ogreb | bijel |
| Gustoća | 2,31 - 2,33 |
| Rastvorljivost | u vrućoj razblaženoj HCl |
Gips[1] je mineral koji se na Mohsovoj skali nalazi pod brojem 2,[2] što znači da je na toj skali drugi najmekši mineral, odmah poslije talka. Hemijska formula mu je CaSO4·2H2O. Fino usitnjeni gips se naziva alabaster, koji je cijenjen za izradu ukrasnih predmeta. Nekada se pojavljuje u obliku sličnom cvijetu, sa uklopljenim zrncima pijeska i naziva se pustinjska ruža.
Sitnozrnati bijeli ili blago nijansirani oblici gipsa poznati kao alabaster korišteni su za skulpture u mnogim kulturama,[3] uključujući Stari Egipat, Mezopotamiju, Stari Rim, Bizantsko Carstvo i alabastere iz Nottinghama iz srednjovjekovne Engleske.
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Pustinjska ruža
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Gips
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Statua od alabastera
Reference
- ^ "Gypsum". www.mindat.org. Pristupljeno 18. 3. 2026.
- ^ "Mohs Scale of Hardness". www.minsocam.org. Pristupljeno 18. 3. 2026.
- ^ "Ancient Arabia: archaeology & history of pre-islamic Arabia". ancientarabia.huma-num.fr (jezik: engleski). Pristupljeno 18. 3. 2026.
Vanjski linkovi
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