| Reference Type | Journal (article/letter/editorial) |
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| Title | Notes on leucophanite from the Ilímaussaq alkaline complex, South Greenland |
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| Journal | Geology of Greenland Survey Bulletin |
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| Authors | Bohse, Henning | Author |
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| Petersen, Ole V. | Author |
| Niedermayr, Gerhard | Author |
| Year | 2001 (December 21) | Volume | 190 |
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| Page(s) | 119-121 | Issue | 190 |
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| Publisher | Geological Survey of Denmark and Greenland |
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| URL | |
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| Download URL | https://geusjournals.org/index.php/ggub/issue/download/427/38+ |
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| DOI | doi:10.34194/ggub.v190.5180Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 16914112 | Long-form Identifier | mindat:1:5:16914112:9 |
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| GUID | ced6e65d-55d8-48a7-b13e-901550f1de82 |
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| Full Reference | Bohse, Henning, Petersen, Ole V., Niedermayr, Gerhard (2001) Notes on leucophanite from the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin, 190 (190) 119-121 doi:10.34194/ggub.v190.5180 |
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| Plain Text | Bohse, Henning, Petersen, Ole V., Niedermayr, Gerhard (2001) Notes on leucophanite from the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin, 190 (190) 119-121 doi:10.34194/ggub.v190.5180 |
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| In | Sørensen, Henning - Ed. (2001) The Ilímaussaq alkaline complex, South Greenland: status of mineralogical research with new results. Geology of Greenland Survey Bulletin 190. GEUS |
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| Abstract/Notes | Leucophanite from the Ilímaussaq alkaline complex was first described in 1905. For nearly 60 years it was believed to be rare and of very limited distribution in Ilímaussaq, but it has lately proved to be of relatively widespread occurrence. Detailed descriptions of the various occurrences are given. The crystals show the forms {001}, {110}, {101}, {102}, {111} and {113}; all the crystals are twinned either along (110) or (010). Optically the Ilímaussaq leucophanite is biaxial with 2Vα (measured) = 40°; α = 1.575, β = γ = 1.597. The empirical formula, calculated on the basis of Si + Al = 4, is: (Ca1.97Mg0.05REE0.06)Σ2.08(Na2.13K0.01)Σ2.14Be1.92(Si3.88Al0.12)Σ4.00O12.01(F1.87OH0.19)Σ2.06. Unit cell parameters determined on the newly found material are a = 7.38–7.40, b = 7.40–7.41, c = 9.96–9.95, all ± 0.01 Å (Kangerluarsuk) and a = 7.43, b = 7.43, c = 9.90, all ± 0.01 Å (Nakkaalaaq). Thus, a full set of data for the Ilímaussaq leucophanite is now available. |
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