Laueite
Mineral Mn2+Fe3+2(PO4)2(OH)2·8H2O
About it
Small honey-brown to amber, wedge-shaped crystals formed as triphylite alters in granite pegmatites. First found at Hagendorf in Bavaria; named for physicist Max von Laue.
- Type
- Mineral
- Group
- Phosphate, laueite group
- Formula
- Mn2+Fe3+2(PO4)2(OH)2·8H2O
- Hardness (Mohs)
- 3
- Specific gravity
- 2.46–2.49
- Streak
- white to pale yellow
- Lustre
- vitreous (glassy)
- Crystal system
- Triclinic
- Colours
- honey brown, amber yellow, orange-yellow
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in one direction
Typical values: real specimens vary. For more, see mindat.org.