| Classification |
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| Species: | Oxycalciopyrochlore |
| Formula: | Ca2Nb2O6O |
| Chemical Analyses: |
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| Oxide wt%: | | 1 | 2 | 3 | 4 | 5 |
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| Na2O | 2,18 % | 2,15 % | 0,12 % | 0 % | 0 % |
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| CaO | 14,06 % | 13,92 % | 6,57 % | 6,58 % | 5,74 % |
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| Fe2O3 | 1,32 % | 1,30 % | 1,42 % | 1,35 % | 1,20 % |
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| TiO2 | 10,55 % | 10,44 % | 9,56 % | 9,48 % | 10,12 % |
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| Nb2O5 | 27,91 % | 27,62 % | 26,70 % | 27,39 % | 26,98 % |
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| Ta2O5 | 18,22 % | 18,03 % | 19,06 % | 17,52 % | 17,86 % |
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| UO2 | 25,12 % | 24,87 % | 24,40 % | 24,15 % | 23,94 % |
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| H2O | 0,64 % | 1,67 % | 12,17 % | 13,53 % | 14,16 % |
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| Total: | 97 % | 96 % | 97 % | 97 % | 96 % |
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| Empirical formulas: | | 1 | (Ca1.14U0.42Na0.32)?1.88(Nb0.95Ti0.60Ta0.37Fe0.08)?2O6.00[O0.61(OH)0.32]?0.93 on the basis of Nb+Ti+Ta+Fe=2 |
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| Sample references: | |
| 1 | - | Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., and Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bulletin of the National Museum of Nature and Science, Ser. C, 39, 1 |
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| 2 | - | Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., and Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bulletin of the National Museum of Nature and Science, Ser. C, 39, 1 |
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| 3 | - | Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., and Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bulletin of the National Museum of Nature and Science, Ser. C, 39, 1 |
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| 4 | - | Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., and Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bulletin of the National Museum of Nature and Science, Ser. C, 39, 1 |
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| 5 | - | Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., and Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bulletin of the National Museum of Nature and Science, Ser. C, 39, 1 |
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| Habit: | octahedral crystals or anhedral grains up to 10mm across |
| Colour: | dark brown to amber yellow |
| Confirmation |
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| Validity: | Believed Valid |
| Data |
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| Mineral Data: | Click here to view Oxycalciopyrochlore data |
| Locality Data: | Click here to view Atagoyama, Koriyama City, Fukushima Prefecture, Japan |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 964795 |
| Long-form Identifier: | 1:3:964795:4 |
| GUID (UUID V4): | 09a09078-b9df-42c8-9683-c5ebc2eb8bc4 |
| References |
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Matsubara, S., Miyawaki, R., Yokoyama, K., Momma, K., Shigeoka, M., and Hashimoto, E. (2013) Pyrochlore and microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bulletin of the National Museum of Nature and Science, Ser. C, 39, 1–6. |
| Reference Search (possible matching items) |
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 | | Journal (article/letter/editorial) | | and syenites: columbite-Mn, fergusonite-Y, oxycalciopyrochlore, Nb-rutile, and Ca-niobate (fersmite or viggezite)...A-site, analyzed minerals could be named as oxycalciopyrochlore according to the dominant constituent rule...rocks, there are only a few examples of oxycalciopyrochlore [69–73]. Similar mineral, oxycalciobetafite...and syenites: columbite-Mn, fergusonite-Y, oxycalciopyrochlore, Nb-rutile, and a Ca-niobate (fersmite/viggezite)...microlite in a pegmatite at Atagoyama, Koriyama City, Fukushima Prefecture, Japan. Bull. Nat. Mus. Nat. Sci |
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