Frondelite
SOLD
Frondelite
- Sold
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- Availability
- Sold
- Size
- 7 x 6 x 4 cm - Sm Cabinet
- Formula
- Mn2+Fe3+4(PO4)3(OH)5 (RRUFF)
- Locality
- Sapucaia mine, Galileia, Doce valley, Minas Gerais, Brazil
- Tagged
- phosphate , pegmatite
Nice specimen rich in Frondelite, the manganese end member of the Fondelite-Rockbridgeite Series. The Frondelite probably makes up most of the mass, but the crystals manifest themselves as 2-3mm to over 1cm platy embedded crystals. Frondelite occurs in manganese/iron rich phosphate bearing pegmatites probably derived from the metasomatism of Triphylite or other primary phosphate. Minor secondary phosphates can also be seen in the mass including phosphosiderite.
Frondelite
- Formula
- Mn2+Fe3+4(PO4)3(OH)5
- Crystal System
- Orthorhombic
- Cleavage
- Perfect, Distinct, Distinct
- Luster
- Vitreous - Dull
- Color
- brown, brown green, brownish black, green black, dark green
- Streak
- brownish gray
- Class
- Orthorhombic - Dipyramidal
- Fracture
- Brittle - Uneven
- Hardness
- 4.5
Data courtesy of Webmineral.
- Collection
- Phillips Collection
- Mineralpedia
- View Frondelite
- On Dakota Matrix
- Previously Sold Frondelite
- On Dakota Matrix
- Other Available Frondelite
- WebMineral
- View Frondelite
- Mindat
- View Frondelite
