Information card for entry 9016275

Structure parameters

• Mineral name: Townendite
• Formula: Ca0.16 Fe0.12 Mn0.16 Na6.42 O18 Si6 Sn0.04 Ti0.01 U0.02 Y0.14 Zr0.67
• Calculated formula: Ca0.16 Fe0.12 Mn0.16 Na6.42 O18 Si6 Sn0.04 Ti0.01 U0.02 Y0.14 Zr0.67
• Title of publication: Townendite, Na8ZrSi6O18, a new uranium-bearing lovozerite group mineral from the Ilimaussaq alkaline complex, Southern Greenland
• Authors of publication: Grey, I. E.; Macrae, C. M.; Mumme, W. G.; Pring, A.
• Journal of publication: American Mineralogist
• Year of publication: 2010
• Journal volume: 95
• Pages of publication: 646 - 650
• a: 10.345 Å
• b: 10.345 Å
• c: 13.103 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 1214.4 ų
• Number of distinct elements: 11
• Space group number: 166
• Hermann-Mauguin space group symbol: R -3 m :H
• Hall space group symbol: -R 3 2"
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No