 | | Report (issue) | | version 1 Crystal Data: Hexagonal. Point Group: 3. Euhedral to subhedral crystals, tabular to short...Group: P 3. a = 7.385–7.387 c = 4.515–4.516 Z=1 X-ray Powder Pattern: Alto do Giz pegmatite, Brazil...54 1.00 0.02 0.10 25.20 0.16 0.12 (2) 0.0 76.4 (3) 8.6 64.6 0.0 0.0 22.8 0.0 0.9 24.3 1.0 1.1 Total...Total 99.96 100.2 99.5 (1) Alto do Giz pegmatite, Brazil. (2) Do.; by electron microprobe, H2 O calculated...= 13:1; corresponding to Al3.93 Ta3.04 O13 (OH). (3) Mumba, Congo; by electron microprobe, H2 O calculated |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Sulfides, Including Selenides and Tellurides Class 3 Sulfosalts ot 150 Oxides Class Class Class Class...Class 55 56 57 58 SieO7 Groups, Generally with No Additional Anions: Sip07 with Additional O, OH, F...chemistry of individual species was discussed, but no chemical formulas were presented, even though Berzelius...essentially completed by Clifford Frondel (1907-). Volume 3 (silica minerals) was completed by Frondel in 1962...without the contributions of colleagues and associates no effort of this magnitude could have been undertaken |
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