Esperita
 Esperita | |
|---|---|
 | |
| Ezaugarri orokorrak | |
| Kategoria | izaki > objektu > objektu material > physical substance (en)  > materia > solido > mineral > mineral fosfato > beryllonite mineral group (en) |
| Formula | PbCa₂(ZnSiO₄)₃ |
| Dana sailkapena | 51.2.1.3 |
| Nickel-Strunz sailkapena | 9.AB.15 |
| Sistema kristalino | Kristal-sistema monokliniko |
| Talde espazial | space group P2₁/n (en) |
| Talde puntual | monoclinic-prismatic (en) |
| Eponimoa | Esper S. Larsen, Jr. (en) |
| Aurkikuntza-lekua | Parker shaft (en) |
| Identifikazioa | |
| Marra | zuria |
| Dentsitate erlatiboa | 4,37143 |
Esperita (PbCa3Zn4(SiO4)4) berun, kaltzio eta zink silikato bat da. Zuria da, 5-5,5 gogortasunekoa Mohs eskalan eta 4,25-4,42 g/cm3ko dentsitatearekin. Sistema monoklinikoan kristaltzen du. Fluoreszentzia erakusten du argi ultramorearekin ikusten denean. Bere izena Esper Signius Larsenen oemenzkoa da, Harvardeko Unibertsitateko mineralogo eta petrologoa.
Ameriketako Estatu Batuetako Franklin herrian aurkitu zen, beste mineral fluoreszente batzuekin batera.
Kanpo estekak
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