| Reference Type | Journal (article/letter/editorial) |
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| Access Rights | Open Access |
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| Title | Hydroxyapophyllite from the Mofjellet mine, Mo i Rana, northern Norway. Contributions to the mineralogy of Norway, No. 66 |
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| Journal | Norsk Geologisk Tidsskrift
[Norwegian Journal of Geology] | ISBN | 0029-196X |
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| Authors | Larsen, Alf Olav | Author |
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| Year | 1981 | Volume | 61 |
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| Issue | 3-4 |
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| Publisher | Norsk Geologisk Forening (Geological Society of Norway) |
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| URL | |
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| Download URL | https://njg.geologi.no/images/NJG_articles/NGT_61_3_4_297-300.pdf |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 16668126 | Long-form Identifier | mindat:1:5:16668126:0 |
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| GUID | 0 |
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| Full Reference | Larsen, Alf Olav (1981) Hydroxyapophyllite from the Mofjellet mine, Mo i Rana, northern Norway. Contributions to the mineralogy of Norway, No. 66. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 61 (3-4) 297-300 |
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| Plain Text | Larsen, Alf Olav (1981) Hydroxyapophyllite from the Mofjellet mine, Mo i Rana, northern Norway. Contributions to the mineralogy of Norway, No. 66. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 61 (3-4) 297-300 |
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| In | (1981) Norsk Geologisk Tidsskrift [Norwegian Journal of Geology] Vol. 61 (3-4) Norsk Geologisk Forening (Geological Society of Norway) |
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| Abstract/Notes | Hydroxyapophyllite occurs as a coating of multiply twinned crystals in the Mofjellet mine near Mo i Rana, northern Norway. The composition corresponds to (K0.94Na0.06)Ca4.10(Si7.98Al0.02)-020(OH)1.18·7.89H2O. It is white to nearly colourless, nonfluorescent. H = 4½. The measured density is 2.375(5) g/cm3, the calculated density 2.385 g/cm3. The unit cell dimensions are a= 8.968(0) Å, c= 15.869 (13) Å and V= 1276.5 Å3. DTA and TG curves are given. Dehydration occurs in two steps, at 285°C and 410°C with respectively 2.5 percent and 14.4 percent weight loss. It is assumed that recrystallization occurs between the two weight loss steps. Recrystallization and formation of CaSiO3 (wollastonite) occurs at 915°C. |
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