| Reference Type | Journal (article/letter/editorial) |
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| Title | Iraqite, a new rare-earth mineral of the ekanite group |
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| Journal | Mineralogical Magazine |
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| Authors | Livingstone, A. | Author |
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| Atkin, D. | Author |
| Hutchison, D. | Author |
| Al-Hermezi, H. M. | Author |
| Year | 1976 (March) | Volume | 40 |
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| Issue | 313 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_40/40-313-441.pdf+ |
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| DOI | doi:10.1180/minmag.1976.040.313.02Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 6910 | Long-form Identifier | mindat:1:5:6910:0 |
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| GUID | 0 |
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| Full Reference | Livingstone, A., Atkin, D., Hutchison, D., Al-Hermezi, H. M. (1976) Iraqite, a new rare-earth mineral of the ekanite group. Mineralogical Magazine, 40 (313) 441-445 doi:10.1180/minmag.1976.040.313.02 |
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| Plain Text | Livingstone, A., Atkin, D., Hutchison, D., Al-Hermezi, H. M. (1976) Iraqite, a new rare-earth mineral of the ekanite group. Mineralogical Magazine, 40 (313) 441-445 doi:10.1180/minmag.1976.040.313.02 |
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| In | (1976, March) Mineralogical Magazine Vol. 40 (313) Mineralogical Society |
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| Abstract/Notes | Iraqite, a new mineral of the ekanite group from northern Iraq, has the composition (Ln1·33 Th0·66x0·15) (K1·07y0·93) (Ca3·49 Ln0·35 Na0·16) (Si15·69 Al0·27) (O39·93 F0·07) where x = U, Pb, Zr, Fe, Mg, and Cu, and y is presumed to be vacant sites. It occurs in granite in contact with dolomitic marble. The colour is pale greenish yellow; H 4½ Dcalc 3·28 and Dmeas 3·27 (Berman balance), both corrected for minor impurity and non-structural water. Optically it is uniaxially negative with ω 1·590 and ε 1·585 though some sections show anomalous extinction up to 7°. Space group is P4/mcc with a 7·61±0·01 and c 14·72±0·02 Å. Strongest lines of the indexed powder pattern are 5·28(100), 3·31(100), 2·64(100), 7·36(80), 3·38(80), 3·40(60), 2·7(40), 7·62(30). Thermal data are given. |
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