Kulanite , Siderite Locality: Crosscut Creek, Area 1 (Kulan Camp), Rapid Creek , Dawson Mining District, Yukon Territory , Canada ( Locality at mindat.org ) Lustrous, very dark blue blades to 5 mm of the phosphate kulanite, with siderite crystals on matrix from the Type Locality in Canada. Ex Royal Ontario Museum and Lewadny Collections. 6.0 x 4.9 x 2.8 cm — Photo: Robert M. Lavinsky · CC BY-SA 3.0
Kulanite
Kulanite is an IMA-recognized mineral species in the phosphate class, with the chemical formula BaFe²⁺₂Al₂(PO₄)₃(OH)₃.
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Bjarebyite structural group.
Key properties: Mohs hardness 4; specific gravity 3.91; Very pale green streak; Vitreous luster; optically biaxial.
IMA symbol Kul, IMA status: approved, named in 1975.
A weathering product in fractures in sideritic iron formation (Cross-cut Creek, Canada); as disseminations and veinlets in granite pegmatite (Xiyuantou, China).
It is found associated with Penikisite, quartz, siderite, fluorapatite, rapidcreekite, brazilianite, arrojadite, anatase, goyazite (Cross-cut Creek, Canada); palermoite, montebrasite.
The mineral was named to honor Mr. Alan Kulan, Ross River, Yukon Territory, Canada, a co-discoverer of the Rapid Creek phosphate occurrences.