English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Lakebogaite, ideally CaNaFe 2  3+ H(UO 2 ) 2 (PO 4 ) 4 (OH) 2 (H 2 O) 8 , is a new Ca-Na-Fe uranyl phosphate mineral from a quarry in Upper Devonian granite near Lake Boga, northern Victoria, Australia. It is associated with Na-analogue of meurigite (IMA 2007-024), torbernite, and saléeite on a matrix of microcline, albite, smoky quartz, and muscovite. Lakebogaite occurs as bright lemon-yellow transparent prismatic crystals up to 0.4 mm across. The crystals have a vitreous luster and a pale yellow streak. Mohs hardness is about 3. The fracture is even to conchoidal. In transmitted light, the mineral is pale yellow with very weak pleochroism: X = yellow, Y = grayish yellow, Z = grayish yellow: dispersion r &gt; v, strong. Lakebogaite crystals are biaxial (+), with slightly variable refractive indices within the ranges: n α  = 1.650(2)-1.652(2), n β  = 1.660(4)-1.664(3), n γ  = 1.681(3)-1.686(2), measured using white light, and with 2V meas  = 80-85° and 2V calc  = 70-74°. Orientation: Y = b; crystals are elongated along [010], resulting in straight extinction. The empirical chemical formula (mean of nine electron microprobe analyses) calculated on the basis of 30 anions is (Ca 1.00 Na 0.80 Sr 0.10 ) Σ1.90 (Fe 3+  1.85 Al 0.30 ) Σ2.15 (UO 2 ) 1.80  (PO 4 ) 4.07 (OH,H 2 O) 10.12 . Lakebogaite is monoclinic, space group Cc, a = 19.6441(5), b = 7.0958(2), c = 18.7029(5) Å, β = 115.692(1)°, V = 2349.3(7) Å 3 , Z = 4. The seven strongest reflections in the powder X-ray diffraction pattern are [dobs in Å (I) (hkl)]: 6.60 (100) (110), 3.16 (40) (514̅, 604̅), 4.07 (20) (404̅), 3.80 (20) (314̅), 3.56 (20) (020, 312), 3.31 (20) (114, 220), 2.797 (20) (006). The crystal structure was solved from single-crystal X-ray diffraction data and refined to R 1  = 0.038 on the basis of 5222 unique reflections with F &gt; 4σF. It comprises pairs of edge-shared UO 7  pentagonal bipyramids that are inter-linked via corner-sharing with PO 4  tetrahedra, to form chains parallel to the c-axis. Each UO 7  polyhedron also shares one of its edges with another PO 4  tetrahedron. The (UO 2 ) 2 (PO 4 ) 4  chains are cross-linked via corner-sharing between the PO 4  tetrahedra and Fe 3+ O 4 (OH) 2  octahedra. The octahedra join together by corner-sharing via OH anions to form chains parallel to b. The Na +  and Ca 2+  cations, and 4 water molecules occupy eight-sided channels along [010]. The remaining water molecules occupy large ten-sided channels directed along [001] and intersecting the [010] channels. The mineral is named for the nearest township.

Lakebogaite, CaNaFe 2 3+ H(UO 2 ) 2 (PO 4 ) 4 (OH) 2 (H 2 O) 8 , a new uranyl phosphate with a unique crystal structure from Victoria, Australia