Formula: Mn2+Fe3+2(PO4)2(OH)2.8H2O
Hydrated phosphate containing hydroxyl, laueite group, paramorph of stewartite, manganese-bearing mineral
Crystal System: Triclinic
Specific gravity: 2.44 to 2.49 measured, 2.56 calculated
Hardness: 3
Streak: White
Colour: Honey-brown, amber, yellow, dark yellow, yellow-orange, reddish orange


Laueite is a common late-stage mineral in oxidised triphylite-bearing granite pegmatites (HOM).


At the type Locality, the Hagendorf South Pegmatite, Waidhaus, Neustadt an der Waldnaab, Upper Palatinate, Bavaria, Germany, laueite is associated with rockbridgeite (HOM).

At the Emmons pegmatite, Greenwood, Oxford county, Maine, USA, laueite is associated with strunzite or beraunite. The Emmons pegmatite is an example of a highly evolved boron-lithium-cesium-tantalum enriched pegmatite (R&M 94.6.510).

At the Palermo No. 1 mine, Groton, Grafton county, New Hampshire, USA, laueite is associated with rockbridgeite, strunzite, stewartite and pseudolaueite, all implanted on siderite and ludlamite (AM 50.1884-1892 HOM).

At the Keyes Mica Quarries, Orange, Grafton County, New Hampshire, USA, the pegmatites are beryl-type rare-element (RE) pegmatites.
The Number 1 mine exposed a pegmatite that shows the most complex zonation and diverse mineralogy of any of the Keyes pegmatites. Six zones are distinguished, as follows, proceeding inward from the margins of the pegmatite:
(1) quartz-muscovite-plagioclase border zone, 2.5 to 30.5 cm thick
(2) plagioclase-quartz-muscovite wall zone, 0.3 to 2.4 metres thick
(3) plagioclase-quartz-perthite-biotite outer intermediate zone, 0.3 to 5.2 metres thick, with lesser muscovite
(4) quartz-plagioclase-muscovite middle intermediate zone, 15.2 to 61.0 cm thick
(5) perthite-quartz inner intermediate zone, 0.9 to 4.6 meters thick
(6) quartz core, 1.5 to 3.0 metres across
The inner and outer intermediate zones contained perthite crystals up to 1.2 meters in size that were altered to vuggy albite-muscovite with fluorapatite crystals. This unit presumably was the source of the albite, muscovite, fluorapatite, quartz and other crystallised minerals found in pieces of vuggy albite rock on the dumps next to the mine.
The middle intermediate zone produced sheet mica with accessory minerals including tourmaline, graftonite, triphylite, vivianite, pyrite, pyrrhotite, and beryl crystals to 30.5 cm long and 12.7 cm across.
Laueite occurs rarely among the secondary phosphates. It forms orange crystals about 1 mm long, associated with strunzite, scorzalite, beraunite and other phosphates (R&M 97.4.320).

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