| Reference Type | Journal (article/letter/editorial) |
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| Title | Lithium-bearing fluor-arfvedsonite from Hurricane Mountain, New Hampshire: a crystal-chemical study. |
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| Journal | Canadian Mineralogist |
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| Authors | Hawthorne, F.C. | Author |
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| Oberti, R. | Author |
| Ottolini, L. | Author |
| Foord, E.E. | Author |
| Year | 1996 | Volume | 34 |
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| Page(s) | 1015-1019 | Issue | 5 |
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| Original Entry | Hawthorne, F.C., Oberti, R., Ottolini, L., and Foord, E.E. (1996b) Lithium-bearing fluor-arfvedsonite from Hurricane Mountain, New Hampshire: a crystal-chemical study. Canadian Mineralogist: 34: 1015-1019. |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 16164554 | Long-form Identifier | mindat:1:5:16164554:0 |
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| GUID | 7cc9998d-5558-4ff8-9026-27d9e3e0aeae |
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| Full Reference | Hawthorne, F.C., Oberti, R., Ottolini, L., Foord, E.E. (1996) Lithium-bearing fluor-arfvedsonite from Hurricane Mountain, New Hampshire: a crystal-chemical study. Canadian Mineralogist, 34 (5) 1015-1019 |
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| Plain Text | Hawthorne, F.C., Oberti, R., Ottolini, L., Foord, E.E. (1996) Lithium-bearing fluor-arfvedsonite from Hurricane Mountain, New Hampshire: a crystal-chemical study. Canadian Mineralogist, 34 (5) 1015-1019 |
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| In | (1996) The Canadian Mineralogist Vol. 34 (5) Mineralogical Association of Canada |
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| Abstract/Notes | The structures of two crystals of Li-bearing fluor-arfvedsonite (1) (K (sub 0.32) Na (sub 0.68) )Na 2 (Li (sub 0.48) Fe (super 2+) (sub 2.83) Mn (super 2+) (sub 0.10) Zn (sub 0.06) Fe (super 3+) (sub 1.46) Ti (sub 0.07) )(Si (sub 7.88) Al (sub 0.12) )O 22 [F (sub 1.15) (OH) (sub 0.85) ] and (2) (K (sub 0.25) Na (sub 0.75) )Na 2 (Li (sub 0.48) Fe (super 2+) (sub 2.84) Mn (super 2+) (sub 0.11) Zn (sub 0.05) Fe (super 3+) (sub 1.45) Ti (sub 0.07) )(Si (sub 7.89) Al (sub 0.11) )O 22 [(F (sub 1.35) (OH) (sub 0.65) ] from a granitic pegmatite, Hurricane Mountain, New Hampshire, have been refined to R indices of 1.5(1.6)% based on 1380(1387) reflections measured with MoKalpha X-radiation. The unit cell parameters are (1) a 9.838(4), b 17.991(6), c 5.315(2) Aa, beta 103.78(3) degrees , V 913.7 Aa 3 and (2) a 9.832(3), b 17.990(7), c 5.316(3) Aa, beta 103.79(3) degrees , V 913.2 Aa 3 . Site-scattering refinement shows Li to be completely ordered at the M(3) site in these crystals. The amphibole composition is intermediate between fluor-arfvedsonite and fluor-ferro-leakeite with a small component (approximately 10%) of fluor-ferro-ferri-nyboite. These amphibole crystals project into miarolitic cavities in a pegmatitic phase of a riebeckite granite. The early-crystallizing amphibole is close to fluor-ferro-leakeite in composition, but becomes progressively depleted in Li and F as crystals project out into miarolitic cavities; the final amphibole to crystallize is a fibrous Li-poor riebeckite. Li plays a significant role in late-stage fractionation involving the crystallization of alkali amphibole in peralkaline granitic environments. |
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