Hectorite
Na0.3(Mg,Li)3Si4O10(F,OH)2·nH2OIMA symbol: Htrquestionable
Hectorite is a silicate mineral with the formula Na0.3(Mg,Li)3Si4O10(F,OH)2·nH2O, crystallizing in the monoclinic system. Its streak is white.
Photos

Physical properties
| Streak | whitesingle sourceWikidata (CC0) |
|---|
Classification
| Nickel-Strunz (10th) | 9.EC.45Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.EC.45Wikidata (CC0) |
| Dana (8th) | 71.3.1b.4Wikidata (CC0) |