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middlebackite

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Journal Article
Published: 02 July 2018
Mineralogical Magazine (2019) 83 (3): 427–433.
...Peter Elliott Abstract Middlebackite is a new supergene mineral formed in the upper levels of the Iron Monarch quarry, South Australia. It occurs as aggregates of blue, prismatic crystals up to 0.3 mm across comprising individual crystals up to 0.05 mm in length associated with atacamite...
FIGURES | View All (7)
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The Fourier-transform IR spectrum of powdered <span class="search-highlight">middlebackite</span>.
Published: 02 July 2018
Fig. 2. The Fourier-transform IR spectrum of powdered middlebackite.
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Coordination of the Cu site in <span class="search-highlight">middlebackite</span> showing Cu–O bond lengths in a...
Published: 02 July 2018
Fig. 5. Coordination of the Cu site in middlebackite showing Cu–O bond lengths in angstroms, Å.
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The crystal structures of: ( a ) <span class="search-highlight">middlebackite</span>; ( b ) moolooite showing the...
Published: 02 July 2018
Fig. 6. The crystal structures of: ( a ) middlebackite; ( b ) moolooite showing the linkage of octahedra in the bc plane.
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The crystal structures of: ( a ) <span class="search-highlight">middlebackite</span>; ( b ) moolooite viewed alon...
Published: 02 July 2018
Fig. 4. The crystal structures of: ( a ) middlebackite; ( b ) moolooite viewed along [010]. The unit cells are outlined.
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The crystal structures of: ( a ) <span class="search-highlight">middlebackite</span>; ( b ) moolooite viewed alon...
Published: 02 July 2018
Fig. 7. The crystal structures of: ( a ) middlebackite; ( b ) moolooite viewed along [001]. The unit cells are outlined.
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Groups of <span class="search-highlight">middlebackite</span> crystals (blue) associated with atacamite (green) o...
Published: 02 July 2018
Fig. 1. Groups of middlebackite crystals (blue) associated with atacamite (green) on quartz. The field of view is 1.1 mm across. Specimen in private collection.
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The sheet of [CuO 3 (OH) 3 ] octahedra in the crystal structure of middleba...
Published: 02 July 2018
Fig. 3. The sheet of [CuO 3 (OH) 3 ] octahedra in the crystal structure of middlebackite. All structure drawings were completed with ATOMS (Dowty, 1999 ).
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Comparison of crystallographic data for <span class="search-highlight">middlebackite</span> and moolooite.       ...
Published: 02 July 2018
Table 7. Comparison of crystallographic data for middlebackite and moolooite. Middlebackite Moolooite Reference This work Clarke and Williams ( 1986 ); Christensen et al. ( 2014 ) Formula Cu 2 C 2 O 4 (OH) 2 CuC 2 O 4 · n H 2 O Crystal system Monoclinic Monoclinic
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Bond valence* (valence units) details for <span class="search-highlight">middlebackite</span>.          Cu  C  H ...
Published: 02 July 2018
Table 6. Bond valence* (valence units) details for middlebackite. Cu C H Σ excluding H Σ including H O1 0.45 1.43 1.88 1.88 O2 0.40 1.42 0.15 1.88 2.03 0.06 OH 0.50 0.85 1.10 1.95 0.46 0.14 C 1.05 Σ 2.01 3.90 1.00
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Compositional data for <span class="search-highlight">middlebackite</span>.         Constituent  Wt.%  Range  S.D...
Published: 02 July 2018
Table 1. Compositional data for middlebackite. Constituent Wt.% Range S.D. CuO 64.18 59.96–69.00 3.07 ZnO 0.16 0.05–0.24 0.07 FeO 0.07 0.02–0.14 0.05 C 2 O 3 * 28.91 P 2 O 5 0.1 0.04–0.16 0.05 Cl 0.35 0.06–0.67 0.20 H 2 O* 7.23 O = Cl
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Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
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Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
Image
Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
Image
Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
Image
Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
Image
Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
Image
Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
Image
Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2
Image
Powder X-ray diffraction data for <span class="search-highlight">middlebackite</span>.          I  obs    I  calc...
Published: 02 July 2018
Table 2. Powder X-ray diffraction data for middlebackite. I obs I calc d obs d calc h k l I obs I calc d obs d calc h k l 16 9 7 . 070 7 . 037 1 0 0 9 10 2 . 350 2 . 346 3 0 0 1 4.450 1 1 0 3 2.218 2.225 2