Formula: Ca2ScSn(Si2O7)(Si2O6OH)
Sorosilicate (Si2O7 groups), kristiansenite group, scandium- and tin- bearing mineral
Crystal System: Triclinic
Specific gravity: 3.64 calculated
Hardness: 5½ to 6
Streak: White
Colour: Colourless, white, slightly yellowish
Luminescence: Nonfluorescent

Hydrothermal environments


Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy. The miarolitic NYF (niobium yttrium fluorine) pegmatites hosted by the calcalkaline Baveno pluton contain an important scandium-minerals association; six of the 19 known scandium mineral species occur as fine crystals in the cavities of the Baveno granite. Bazzite was the first scandium mineral found and described from here. Baveno is also the type locality for cascandite, scandiobabingtonite and jervisite. Thorveitite and kristiansenite have also been identified from Baveno (CM 57.489-498).

At the type locality, the Heftetjern pegmatite, Tørdal, Drangedal, Vestfold og Telemark, Norway, kristiansenite occurs as colourless, white, or slightly yellowish tapered crystals, to 2 mm long, and as aggregates to 2 mm across.
Kristiansenite is a late-stage hydrothermal mineral, occurring in vugs in the granite pegmatite. Associated minerals include quartz, albite, apatite, stilpnomelane, scandiobabingtonite, ixiolite, hingganite-(Y), cerium-bearing epidote, titanite, bazzite, milarite and cassiterite (AM 88.251, CM 41.815).

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