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Formula: BiAl3(PO4)2(OH)6
Anhydrous phosphate, plumbogummite group,
alunite supergroup,
bismuth-bearing mineral
Crystal System: Hexagonal
Specific gravity: 4.08 calculated
Hardness: 4 to 5
Streak: White
Colour: Colourless, white, pale blue, pale brown
Environments
Waylandite is a rare secondary mineral replacing
primary bismuth
minerals
(HOM).
Localities
At the Kobokobo pegmatite, Shabunda Territory, South Kivu, DR Congo, waylandite is associated with
bismutotantalite
(HOM).
At Johanngeorgenstadt, Erzgebirgskreis, Saxony, Germany, specimens of waylandite have been found at the Schaar
shaft, as lustrous yellow microcrystals less than 0.1 mm in size. The watery green to yellowish cloudy rhombohedra and
crystal aggregates resemble the waylandite from Roten Berg (see below). Spherical aggregates are probably
pseudomorphs after beyerite.
Waylandite has also been reported from the Himmelfahrt mine
(Minrec 55.5.625).
At the Roter Berg mining district, Zschorlau, Erzgebirgskreis, Saxony, Germany,
schneebergite and
nickelschneebergite were discovered on samples from the former
mining area; associated minerals are scorodite,
bariopharmacosiderite,
ferrilotharmeyerite
(cobalt-bearing, bismuth-bearing),
preisingerite and waylandite
(EJM 14.1.115–126).
Waylandite from Roter Berg
At the type locality, Wampewo Hill, Busiro county, Wakiso, Central Region, Uganda, waylandite occurs as
veinlets and marginal crusts as a replacement of bismutotantalite
in the lithium
pegmatite
(AM 48.216).
At the Restormel Royal Iron Mine, Lostwithiel, Cornwall, England, UK, waylandite is associated with
bismutite
(HOM).
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