Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland
The new mineral, dyrnaesite-(La), is found in the Ilímaussaq alkaline complex, South Greenland. The holotype material originates from an arfvedsonite lujavrite sheet as an accessory mineral. Dyrnaesite-(La) is pale yellowish green, with no cleavage and an irregular fracture. Density is 3.68(2)/3.682...
Published in: | Mineralogical Magazine |
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Online Access: | https://curis.ku.dk/portal/da/publications/dyrnaesitela-a-new-hyperagpaitic-mineral-from-the-ilimaussaq-alkaline-complex-south-greenland(3623940a-afa1-4fad-865a-e835044c75fb).html https://doi.org/10.1180/minmag.2016.080.075 |
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ftcopenhagenunip:oai:pure.atira.dk:publications/3623940a-afa1-4fad-865a-e835044c75fb 2023-10-25T01:39:05+02:00 Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland Rønsbo, Jørn G. Balic Zunic, Tonci Petersen, Ole V. 2017 https://curis.ku.dk/portal/da/publications/dyrnaesitela-a-new-hyperagpaitic-mineral-from-the-ilimaussaq-alkaline-complex-south-greenland(3623940a-afa1-4fad-865a-e835044c75fb).html https://doi.org/10.1180/minmag.2016.080.075 eng eng info:eu-repo/semantics/closedAccess Rønsbo , J G , Balic Zunic , T & Petersen , O V 2017 , ' Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland ' , Mineralogical Magazine , vol. 81 , no. 1 , pp. 103-111 . https://doi.org/10.1180/minmag.2016.080.075 /dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science dyrnaesite-(La) new mineral optical properties chemical analyses X-ray data vitusite Ilímaussaq article 2017 ftcopenhagenunip https://doi.org/10.1180/minmag.2016.080.075 2023-09-27T23:01:20Z The new mineral, dyrnaesite-(La), is found in the Ilímaussaq alkaline complex, South Greenland. The holotype material originates from an arfvedsonite lujavrite sheet as an accessory mineral. Dyrnaesite-(La) is pale yellowish green, with no cleavage and an irregular fracture. Density is 3.68(2)/3.682 g/cm 3 (measured/ calculated). It is biaxial, negative, 2Vα = 47(1)/48 (measured/calculated); α = 1.6226(5), β = 1.6852(10), γ = 1.6982(2); X = c, Y = a, Z = b. The average values of microprobe analyses are (wt.%) P 2 O 5 37.17, SiO 2 0.15, CaO 0.90, Na 2 O 20.06, La 2 O 3 16.44, CeO 2 20.23, Pr 2 O 3 1.40, Nd 2 O 3 3.47, Sm 2 O 3 0.24, Dy 2 O 3 0.06, Y 2 O 3 0.06. The crystal structure was solved from single-crystal X-ray diffraction data. Dyrnaesite-(La) is orthorhombic, Pnma; a = 18.4662(7) Å, b = 16.0106(5) Å, c = 7.0274(2) Å, V = 2077.7(2) Å 3 , Z = 4. The structural formula calculated from the diffraction data and microprobe analysis is Na 7.89 (Ce 0.94 Ca 0.06 ) Σ1.00 (Ca 0.12 La 1.14 Ce 0.40 Pr 0.10 Nd 0.24 ) Σ2.00 (PO 4 ) 6 , the simplified formula is Na8Ce4+REE2(PO4)6. The crystal structure is related closely to that of vitusite-(Ce), but is distinct from it in several aspects. The five strongest lines of the powder X-ray diffraction pattern are (d Å, (I %), (hkl)); 6.57 (100) (101), 4.62 (40) (301, 230, 400), 3.50 (40) (331), 2.80 (86) (232, 402), 2.67 (54) (060,630). Article in Journal/Newspaper Greenland University of Copenhagen: Research Dy ENVELOPE(11.369,11.369,64.834,64.834) Greenland Mineralogical Magazine 81 1 103 111 |
institution |
Open Polar |
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University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
/dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science dyrnaesite-(La) new mineral optical properties chemical analyses X-ray data vitusite Ilímaussaq |
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/dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science dyrnaesite-(La) new mineral optical properties chemical analyses X-ray data vitusite Ilímaussaq Rønsbo, Jørn G. Balic Zunic, Tonci Petersen, Ole V. Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland |
topic_facet |
/dk/atira/pure/core/keywords/TheFacultyOfScience Faculty of Science dyrnaesite-(La) new mineral optical properties chemical analyses X-ray data vitusite Ilímaussaq |
description |
The new mineral, dyrnaesite-(La), is found in the Ilímaussaq alkaline complex, South Greenland. The holotype material originates from an arfvedsonite lujavrite sheet as an accessory mineral. Dyrnaesite-(La) is pale yellowish green, with no cleavage and an irregular fracture. Density is 3.68(2)/3.682 g/cm 3 (measured/ calculated). It is biaxial, negative, 2Vα = 47(1)/48 (measured/calculated); α = 1.6226(5), β = 1.6852(10), γ = 1.6982(2); X = c, Y = a, Z = b. The average values of microprobe analyses are (wt.%) P 2 O 5 37.17, SiO 2 0.15, CaO 0.90, Na 2 O 20.06, La 2 O 3 16.44, CeO 2 20.23, Pr 2 O 3 1.40, Nd 2 O 3 3.47, Sm 2 O 3 0.24, Dy 2 O 3 0.06, Y 2 O 3 0.06. The crystal structure was solved from single-crystal X-ray diffraction data. Dyrnaesite-(La) is orthorhombic, Pnma; a = 18.4662(7) Å, b = 16.0106(5) Å, c = 7.0274(2) Å, V = 2077.7(2) Å 3 , Z = 4. The structural formula calculated from the diffraction data and microprobe analysis is Na 7.89 (Ce 0.94 Ca 0.06 ) Σ1.00 (Ca 0.12 La 1.14 Ce 0.40 Pr 0.10 Nd 0.24 ) Σ2.00 (PO 4 ) 6 , the simplified formula is Na8Ce4+REE2(PO4)6. The crystal structure is related closely to that of vitusite-(Ce), but is distinct from it in several aspects. The five strongest lines of the powder X-ray diffraction pattern are (d Å, (I %), (hkl)); 6.57 (100) (101), 4.62 (40) (301, 230, 400), 3.50 (40) (331), 2.80 (86) (232, 402), 2.67 (54) (060,630). |
format |
Article in Journal/Newspaper |
author |
Rønsbo, Jørn G. Balic Zunic, Tonci Petersen, Ole V. |
author_facet |
Rønsbo, Jørn G. Balic Zunic, Tonci Petersen, Ole V. |
author_sort |
Rønsbo, Jørn G. |
title |
Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland |
title_short |
Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland |
title_full |
Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland |
title_fullStr |
Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland |
title_full_unstemmed |
Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland |
title_sort |
dyrnaesite-(la) a new hyperagpaitic mineral from the ilímaussaq alkaline complex, south greenland |
publishDate |
2017 |
url |
https://curis.ku.dk/portal/da/publications/dyrnaesitela-a-new-hyperagpaitic-mineral-from-the-ilimaussaq-alkaline-complex-south-greenland(3623940a-afa1-4fad-865a-e835044c75fb).html https://doi.org/10.1180/minmag.2016.080.075 |
long_lat |
ENVELOPE(11.369,11.369,64.834,64.834) |
geographic |
Dy Greenland |
geographic_facet |
Dy Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Rønsbo , J G , Balic Zunic , T & Petersen , O V 2017 , ' Dyrnaesite-(La) a new hyperagpaitic mineral from the Ilímaussaq alkaline complex, South Greenland ' , Mineralogical Magazine , vol. 81 , no. 1 , pp. 103-111 . https://doi.org/10.1180/minmag.2016.080.075 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1180/minmag.2016.080.075 |
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Mineralogical Magazine |
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81 |
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103 |
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111 |
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1780734266303315968 |