Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Kristiansenite from
Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway


00657020017271953974485.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
07814200017811965836880.jpg
Kristiansenite, etc.

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
07041430017272005747678.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
01921070017271929559127.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
05391220017367209535789.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
01555590017810890356988.jpg
Kristiansenite, etc.

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
07041430017272005747678.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
01921070017271929559127.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
00657020017271953974485.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
09918880017811965831549.jpg
Kristiansenite, etc.

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
07041430017272005747678.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
09936030017271929576523.jpg
Kristiansenite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
Locality type:Pegmatite
Classification
Species:Kristiansenite
Formula:Ca4(Sc2Sn2)[Si2O7]2[Si2O6OH]2
Habit:Triclinic
Colour:Colourless, greyish, yellowish
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Very Rare
Confirmation
Validity:Valid - Type Locality
Associated Minerals Based on Photo Data:
Quartz5
Stilpnomelane4
Albite3
Scandiobabingtonite3
Cascandite2
Titanite1
- var Triclinic Titanite1
Epidote1
Data
Mineral Data:Click here to view Kristiansenite data
Locality Data:Click here to view Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
Photo GalleryView Gallery (21 photos)
Data Identifiers
Mindat Occurrence Record ID:60225
Long-form Identifier:1:3:60225:1
GUID (UUID V4):0
References
Ferraris, G., Gula, A., Ivaldi, G., Nespolo, Massimo, Raade, G. (2001) Crystal structure of kristiansenite: a case of class IIB twinning by metric merohedry. Zeitschrift für Kristallographie - Crystalline Materials, 216 (8) doi:10.1524/zkri.216.8.442.20353
Raade, G., Ferraris, G., Gula, A., Ivaldi, G., Bernhard, F. (2002) Kristiansenite, a new calcium-scandium-tin sorosilicate from granite pegmatite in Tørdal, Telemark, Norway. Mineralogy and Petrology, 75 (1) 89-99 doi:10.1007/s007100200017
Chukanov, Nikita V.; Zubkova, Natalia V.; Kasatkin, Anatoly V.; Pekov, Igor V.; Agakhanov, Atali A.; Yapaskurt, Vasiliy O.; Virus, Alla A.; Ksenofontov, Dmitry A.; Britvin, Sergey N. (2026) Partial Ordering of Cations by the Wolframite Mechanism Using Fe2+- and Sc-Dominant Minerals of the Columbite Supergroup as Examples. Minerals, 16 (5). p.536. doi:10.3390/min16050536
 
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