| 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 | 2.00 % | 2.00 % | 0.00 % | 0.00 % | 0.00 % |
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| CaO | 14.00 % | 13.00 % | 6.00 % | 6.00 % | 5.00 % |
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| Fe2O3 | 1.00 % | 1.00 % | 1.00 % | 1.00 % | 1.00 % |
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| TiO2 | 10.00 % | 10.00 % | 9.00 % | 9.00 % | 10.00 % |
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| Nb2O5 | 27.00 % | 27.00 % | 26.00 % | 27.00 % | 26.00 % |
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| Ta2O5 | 18.00 % | 18.00 % | 19.00 % | 17.00 % | 17.00 % |
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| UO2 | 25.00 % | 24.00 % | 24.00 % | 24.00 % | 23.00 % |
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| H2O | 0.00 % | 1.00 % | 12.00 % | 13.00 % | 14.00 % |
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| Total: | 97.00 % | 96.00 % | 97.00 % | 97.00 % | 96.00 % |
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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): | 0 |
| 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. |
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