Phengite from
Gilba Valley, Brossasco, Cuneo Province, Piedmont, Italy
| Locality type: | Valley | |
| Classification | ||
|---|---|---|
| Species: | Muscovite var: Phengite | |
| Formula: | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 | |
| Comments: | Different types of phengite are observed in the host rock and as inclusions in pyrope crystals. The white mica, occurring as inclusions in pyrope, is a Fe-free phengite ascribable to an intermediate member of the solid-solution series aluminoceladonite-muscovite. A typical composition, represented by the empirical formula K0.93Na0.02(Al1.41Mg0.59)(Si3.60Al0.40O10)(OH)2, is reported by Chukanov (2014). | |
| Confirmation | ||
| Validity: | Believed Valid | |
| Data | ||
| Mineral Data: | Click here to view Phengite data | |
| Locality Data: | Click here to view Gilba Valley, Brossasco, Cuneo Province, Piedmont, Italy | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 574814 | |
| Long-form Identifier: | 1:3:574814:3 | |
| GUID (UUID V4): | 78882830-7591-4bfc-ac82-0f3e61345d8d | |
| Nearest other occurrences of Phengite | ||
| 9.0km (5.6 miles) | ⓘPratoluogo, Venasca, Cuneo Province, Piedmont, Italy | |
| 10.9km (6.8 miles) | ⓘVerné, Sampeyre, Cuneo Province, Piedmont, Italy | |
| 10.9km (6.8 miles) | ⓘPunta Rasciassa, Oncino, Cuneo Province, Piedmont, Italy | |
| 13.9km (8.6 miles) | ⓘCastello Oddino quarries, Barge, Cuneo Province, Piedmont, Italy | |
| 14.5km (9.0 miles) | ⓘCion quarries, Barge, Cuneo Province, Piedmont, Italy | |
| 14.5km (9.0 miles) | ⓘPerrone quarries, Barge, Cuneo Province, Piedmont, Italy | |
| 15.6km (9.7 miles) | ⓘMorelli outcrop, Elva, Cuneo Province, Piedmont, Italy | |
| 15.6km (9.7 miles) | ⓘRocca del Toro Quarry, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy | |
| 15.6km (9.7 miles) | ⓘBalma Oro Quarry, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy | |
| 16.1km (10.0 miles) | ⓘCassetta Quarry, Montoso Quarries, Bagnolo Piemonte, Cuneo Province, Piedmont, Italy | |
| References | ||
Gilba Valley, Brossasco, Cuneo Province, Piedmont, Italy