PDF versionniobokupletskite . A beige to brown triclinic mineral of the astrophyllite group: K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH,O,F)5. It is the Nb analogue of kupletskite.
PDF versionniobokupletskite
PDF versionPDF versionPDF versionPDF versionniobokupletskite . A beige to brown triclinic mineral of the astrophyllite group: K2Na(Mn,Zn,Fe)7(Nb,Zr,Ti)2Si8O26(OH,O,F)5. It is the Nb analogue of kupletskite.