| Mineral: | Niobokupletskite: K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH)4(O,F)
Kupletskite: K2Na(Mn,Fe++)7(Ti,Nb)2Si8O26(OH)4F
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| Comments: | Back-scattered electron image of Niobokupletskite (Nkpt) rimming kupletskite (Kpt). The zoning in the kupletskite is from Nb-poor to Nb-rich in the direction of the arrow (dark to medium gray). (CanMin v 38, p 628). |
| Location: | Mont Saint-Hilaire, Quebec, Canada. |
| Scale: | Scale bar 100 µ-m. |
| Copyright: | © Canadian Mineralogist |
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