| Bradaczekite Mineral Data |
General Bradaczekite Information |
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| NaCu4(AsO4)3 | |||
| Molecular Weight = 686.00 gm | |||
| Sodium 4.02 % Na 5.42 % Na2O | |||
| Zinc 0.95 % Zn 1.19 % ZnO | |||
| Copper 34.27 % Cu 38.59 % Cu2O | |||
| Arsenic 32.76 % As 50.26 % As2O5 | |||
| Oxygen 27.99 % O | |||
| ______ ______ | |||
| 100.00 % 95.45 % = TOTAL OXIDE | |||
| Na1.2Cu3.7Zn0.1(AsO4)3 | |||
| Fumarolic sublimate product. Alluaudite-wyllieite group; structure | |||
| Approved IMA 2000 (Dana # Added) | |||
| North Breach of the Tolbachik Great fissure eruption, Kamchatka Peninsula, Russia. Link to MinDat.org Location Data. | |||
| Named for Hans Bradaczek (1940-), crystallographer of the Free University of Berlin. | |||
| IMA2000-002 | |||
Bradaczekite Image | |||
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Bradaczekite Crystallography |
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| a:b:c =0.9691:1:0.5843 | |||
| a = 12.051, b = 12.434, c = 7.2662, Z = 4; beta = 117.942° V = 961.86 Den(Calc)= 4.74 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c | |||
| By Intensity(I/Io): 3.43(1)(112,310), 3.21(0.35)(002), 2.683(0.3)(240),2.791(0.24)(402), 3.6(0.21)(202,131), 6.22(0.21), | |||
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Physical Properties of Bradaczekite |
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| None | |||
| Dark blue. | |||
| Translucent | |||
| Aggregates - Made of numerous individual crystals or clusters. | |||
| Adamantine | |||
| pale blue white | |||
Optical Properties of Bradaczekite |
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| CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1857,KC= 0.1839 |
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| Biaxial (-), a=1.76, b=1.92, g=1.96, bire=0.2000 | |||
Calculated Properties of Bradaczekite |
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relectron=4.40 gm/cc |
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| Fermion Index = 0.00052 Boson Index = 0.99948 |
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PEBradaczekite = 38.93 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Bradaczekite is Not Radioactive |
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Bradaczekite Classification |
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| 38.2.4.6 (38)Anhydrous Phosphates, etc | |||
| (38.2)(A+ B++)5 (XO4)3 | |||
| (38.2.4)Alluaudite-Wyllieite Group (Wyllieite Subgroup) | |||
| VII/A.07-15 VII - Phosphates, Arsenates and Vanadates | |||
| VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na | |||
| VII/A.07 - Johillerite - Nickenichite series | |||
Other Bradaczekite Information |
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| NAME( AmMin, Vol 87, p 765) PHYS. PROP.(AmMin, Vol 87, p 765) OPTIC PROP.(AmMin, Vol 87, p 765) | |||
| Links to other databases for Bradaczekite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas Search for Bradaczekite using: Visit our Advertisers for Bradaczekite : Translate Bradaczekite Mineral Data : Ask about Bradaczekite here : Print or Cut-and-Paste your Bradaczekite Specimen Label here :
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