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Milarite from
Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway


01763190017272731502610.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
02570520017272005793742.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
00539020017272005828378.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
08418520017272005838943.jpg
Milarite, etc.

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
02445460017367882712543.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
02076460017367882725781.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
00690450017367882735344.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
08109760017369517676416.jpg
Milarite, etc.

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
01763190017272731502610.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
02570520017272005793742.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
00539020017272005828378.jpg
Milarite

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
08418520017272005838943.jpg
Milarite, etc.

Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
Locality type:Pegmatite
Classification
Species:Milarite
Formula:K(◻H2O)Ca2(Be2Al)[Si12O30]
Chemical Analyses:
Oxide wt%:
12
SiO273.44 %73.24 %
Al2O30.75 %0.92 %
Sc2O35.90 %6.47 %
Y2O30.15 %0.42 %
FeO0.22 %0.00 %
MnO0.63 %0.20 %
CaO5.88 %6.43 %
K2O4.78 %4.82 %
BeO7.27 %0.00 %
Na2O0.00 %0.02 %
Fe2O30.00 %0.09 %
Total:99.02 %92.61 %
Empirical formulas:
2(K0.99Na0.01)Σ1.00(Ca1.10Sc0.90Y0.04Mn0.03)Σ2.07(Si11.75Al0.17Fe3+0.01)Σ11.93
Sample references:
1 -
Cooper, M. A., Hawthorne, F. C., Ball, N. A., Černý, Petr, Kristiansen, Roy (2006) Oftedalite, (ScCa)KBe3Si12O30, a new mineral species of the milarite group from the Heftetjern pegmatite, Tørdal, Norway: description and crystal structure. The Canadian Mineralogist, 44 (4) 943-949 doi:10.2113/gscanmin.44.4.943 Sc-rich milarite
2 -
Raade, Gunnar, Bernhard, Franz, Ottolini, Luisa (2004) Replacement textures involving four scandium silicate minerals in the Heftetjern granitic pegmatite, Norway. European Journal of Mineralogy, 16 (6) 945-950 doi:10.1127/0935-1221/2004/0016-0945Scandian milarite
Comments:Milarite of normal composition is rather common at Heftetjern, and it is visually not distinguisable from oftedalite which is extremely rare and contains 5–7 wt% Sc2O3 and milarite with high yttrium content (rare). One sample with very high Y (~10 wt% Y2O3)was described as the new mineral Agakhanovite-(Y) by Hawthorne et al (2014).
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Stilpnomelane4
Albite1
Agakhanovite-(Y)1
Data
Mineral Data:Click here to view Milarite data
Locality Data:Click here to view Heftetjern pegmatite, Tørdal, Drangedal, Telemark, Norway
Photo GalleryView Gallery (10 photos)
Data Identifiers
Mindat Occurrence Record ID:155793
Long-form Identifier:1:3:155793:0
GUID (UUID V4):0
Nearest other occurrences of Milarite
0.7km (0.5 miles) ⓘHøydalen, Tørdal, Drangedal, Telemark, Norway
55.9km (34.7 miles) ⓘKjølsrød, Bjørkedalen, Porsgrunn, Telemark, Norway
72.4km (45.0 miles) ⓘHoltehædde, Hedrum, Larvik Commune, Vestfold, Norway
75.7km (47.1 miles) ⓘFuglevika Feldspar Prospect, Fuglevika, Stavern (Fredriksvärn), Larvik Commune, Vestfold, Norway
88.4km (54.9 miles) ⓘBrattekleiv Feldspar Quarry (Lauvland 04), Lauvland, Evje og Hornnes, Agder, Norway
89.2km (55.4 miles) ⓘFrikstad 02 Feldspar Quarry (Litjern), Frikstad, Iveland, Agder, Norway
89.4km (55.5 miles) ⓘHimberg Quarry, Ramnes, Tønsberg, Vestfold, Norway
References
Raade, Gunnar, Erambert, Muriel (1999) An intergrowth of scandiobabingtonite and cascandite from the Heftetjern granite pegmatite, Norway. Neues Jahrbuch für Mineralogie - Monatshefte, 1999 (12) 545-550
Raade, Gunnar, Kristiansen, Roy (2000) Mineralogy and geochemistry of the Heftetjern granite pegmatite, Tørdal: a progress report. Norsk Bergverksmuseum Skrift, 17. 19-25
Pieczka, Adam, Kristiansen, Roy, Stachowicz, Marcin, Dumańska-Słowik, Magdalena, Gołębiowska, Bożena, Sęk, Mateusz P., Nejbert, Krzysztof, Kotowski, Jakub, Marciniak-Maliszewska, Beata, Szuszkiewicz, Adam, et al. (2024) Heflikite, ideally Ca2(Al2Sc)(Si2O7)(SiO4)O(OH), the first scandium epidote-supergroup mineral from Jordanów Śląski, Lower Silesia, Poland and from Heftetjern, Tørdal, Norway. Mineralogical Magazine, 88 (3). 228-243 doi:10.1180/mgm.2023.98
 
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