Malayait z Horního Nezdína u Ledče nad Sázavou (Česká republika)
Petr Pauliš, Jiří Švestka
| Stránky | 96-98 |
|---|---|
| Citace | PAULIŠ, Petr a ŠVESTKA, Jiří. Malayait z Horního Nezdína u Ledče nad Sázavou (Česká republika). Bulletin mineralogicko-petrologického oddělení Národního muzea v Praze. Praha: Národní muzeum, 2010, 18(2), 96-98. ISSN 1211-0329 (print) 1804-6495 (online). Dostupné také z: https://publikace.nm.cz/periodicke-publikace/bmpholnrhmvp/18-2/malayait-z-horniho-nezdina-u-ledce-nad-sazavou-ceska-republika |
Malayaite, a monoclinic mineral CaSn[OI(SiO4)] of the titanite group, was recently identified in skarns NE of Horní Nezdín village ca 5 km NE of the town of Ledeč nad Sázavou (Czech Republic). This locality was geologically explored in search for tungsten in the 1980s. Malayaite associated with scheelite forms colorless to yellowish glassy max. 5 mm long flat grains and imperfectly developed tabular crystals mostly occurring in quartz accumulations in garnet-pyroxene skarn. The mineral exhibits a distinct greenish-yellow luminescence under short-wave UV light. The mineral is almost pure malayaite of which its chemical composition is close to the theoretical formula. XRD data also correspond to those reported in the literature.