| Reference Type | Journal (article/letter/editorial) |
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| Access Rights | Open Access |
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| Title | Polylithionite from syenite pegmatite at Vøra, Sandefjord, Oslo Region, Norway. Contributions to the mineralogy of Norway, No. 65 |
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| Journal | Norsk Geologisk Tidsskrift
[Norwegian Journal of Geology] | ISSN | 0029-196X |
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| Authors | Raade, Gunnar | Author |
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| Larsen, Alf Olav | Author |
| Year | 1980 | Volume | 60 |
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| Page(s) | 117-124 | Issue | 2 |
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| URL | |
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| Download URL | https://njg.geologi.no/images/NJG_articles/NGT_60_2_117-124.pdf+ |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 16640564 | Long-form Identifier | mindat:1:5:16640564:4 |
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| GUID | cce1223d-2879-47a1-8c23-376a207b1d55 |
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| Full Reference | Raade, Gunnar, Larsen, Alf Olav (1980) Polylithionite from syenite pegmatite at Vøra, Sandefjord, Oslo Region, Norway. Contributions to the mineralogy of Norway, No. 65. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 60 (2) 117-124 |
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| Plain Text | Raade, Gunnar, Larsen, Alf Olav (1980) Polylithionite from syenite pegmatite at Vøra, Sandefjord, Oslo Region, Norway. Contributions to the mineralogy of Norway, No. 65. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 60 (2) 117-124 |
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| In | (1980) Norsk Geologisk Tidsskrift [Norwegian Journal of Geology] Vol. 60 (2) Norsk Geologisk Forening (Geological Society of Norway) |
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| Abstract/Notes | Polylithionite from Vøra has a chemical composition close to the ideal end-member formula KLi2AlS4O10F2. It has the l M polytype structure with a= 5.196(4), b= 8.960(4), c= 10.051(4) Å, ? = 100.29(5)°. The measured density is 2.82(1) g/cm3, the calculated density 2.84 g/cm3. Optical measurements gave ? = 1.556(1) , ?= 1.559(1) , 2Vª = 43(3)° on one sample and ? = 1.551(1) , ?= 1.555(1) on another. DTA/TGA curves and infrared spectrum are given. The mineral paragenesis of the Vøra syenite pegmatite is reported, and data are given that indicate enrichment of Li in the dark mineral constituents. The Gladstone-Dale relationship applied to micas is shown to give better agreement between calculated and measured mean refractive index using k-values from Larsen & Berman ( 1934) than using the values of Mandarino (1976) |
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