| Reference Type | Journal (article/letter/editorial) |
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| Title | Perhamite, a new calcium aluminum silico-phosphate mineral, and a re-examination of viséite |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Dunn, Pete J. | Author |
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| Appleman, Daniel E. | Author |
| Year | 1977 (December) | Volume | 41 |
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| Issue | 320 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_41/41-320-437.pdf+ |
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| DOI | doi:10.1180/minmag.1977.041.320.03Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 2817 | Long-form Identifier | mindat:1:5:2817:6 |
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| GUID | 0 |
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| Full Reference | Dunn, Pete J., Appleman, Daniel E. (1977) Perhamite, a new calcium aluminum silico-phosphate mineral, and a re-examination of viséite. Mineralogical Magazine, 41 (320) 437-442 doi:10.1180/minmag.1977.041.320.03 |
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| Plain Text | Dunn, Pete J., Appleman, Daniel E. (1977) Perhamite, a new calcium aluminum silico-phosphate mineral, and a re-examination of viséite. Mineralogical Magazine, 41 (320) 437-442 doi:10.1180/minmag.1977.041.320.03 |
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| In | (1977, December) Mineralogical Magazine Vol. 41 (320) Mineralogical Society |
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| Abstract/Notes | SummaryA new calcium aluminum silico-phosphate mineral has been found at two locations on Newry Hill, Newry, Maine, U.S.A. Its composition closely approximates to 3CaO.3·5Al2O3.3SiO2.2P2O5.18H2O (Z = 1). Perhamite is uniaxial (+), c = 1577, ω = 1·564, density = 2·64 g/cm3. The mineral is hexagonal, probably P6/mmm, with a = 7·02 Å, c = 20·21 Å. The colour is light brown to white, the habit is as aggregates of discoidal hexagonal crystals. Cleavage is perfect {0001}, the lustre is vitreous, and the streak white. The mineral is named for a pegmatite miner and geologist, Frank C. Perham of West Paris, Maine, U.S.A.The most similar species is viséite. A re-examination of viséite indicates that the composition previously given is incorrect. A new form of viséite, also from Visé, Liège, Belgium is also examined and found to differ in composition from the type material. |
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