Research output: Contribution to journal › Article › peer-review
Goldhillite, Cu5Zn(AsO4)2(OH)6.H2O, a new mineral species, and redefinition of philipsburgite, Cu5Zn[(AsO4)(PO4)](OH)6.H2O, as an As-P ordered species. / Ismagilova, Rezeda M.; Rieck, Branko; Kampf, Anthony R.; Giester, Gerald; Zhitova, Elena S.; Lengauer, Christian L.; Krivovichev, Sergey V.; Zolotarev, Andrey A.; Ciesielczuk, Justyna; Mikhailova, Julia A.; Belakovsky, Dmitry I.; Bocharov, Vladimir N.; Shilovskikh, Vladimir V.; Vlasenko, Natalia S.; Nash, Barbara P.; Adams, Paul M.
In: Mineralogical Magazine, Vol. 86, No. 3, 13.06.2022, p. 436-446.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Goldhillite, Cu5Zn(AsO4)2(OH)6.H2O, a new mineral species, and redefinition of philipsburgite, Cu5Zn[(AsO4)(PO4)](OH)6.H2O, as an As-P ordered species
AU - Ismagilova, Rezeda M.
AU - Rieck, Branko
AU - Kampf, Anthony R.
AU - Giester, Gerald
AU - Zhitova, Elena S.
AU - Lengauer, Christian L.
AU - Krivovichev, Sergey V.
AU - Zolotarev, Andrey A.
AU - Ciesielczuk, Justyna
AU - Mikhailova, Julia A.
AU - Belakovsky, Dmitry I.
AU - Bocharov, Vladimir N.
AU - Shilovskikh, Vladimir V.
AU - Vlasenko, Natalia S.
AU - Nash, Barbara P.
AU - Adams, Paul M.
N1 - Publisher Copyright: Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Mineralogical Society of Great Britain and Ireland.
PY - 2022/6/13
Y1 - 2022/6/13
N2 - Philipsburgite has been redefined as the intermediate member of the goldhillite-philipsburgite-kipushite isomorphous series with the ideal formula Cu5Zn[(AsO4)(PO4)](OH)6-H2O due to the site-selective As-P substitution. The new mineral goldhillite, ideally Cu5Zn(AsO4)2(OH)6-H2O [or Cu5Zn(AsO4)(AsO4)(OH)6-H2O], is the arsenate end-member of this series. Goldhillite occurs on fracture surfaces in a rock comprised mostly of quartz with iron hydroxides in association with mixite, cornwallite and conichalcite. Goldhillite forms transparent, bright emerald-green, tabular crystals with vitreous lustre, flattened on {100}, up to 1 mm across and in rosettes up to 1.5 mm. The mineral is brittle with uneven fracture and perfect cleavage on {100}; the Mohs hardness is 3.5. The calculated density for the holotype is 4.199 g cm-3. The Raman spectrum is consistent with the presence of H2O-molecules, OH-groups, AsO4 tetrahedra and traces of PO4. Electron microprobe analyses of goldhillite (H2O content based on the crystal structure) provided: CuO 48.91, ZnO 13.18, As2O5 26.06, P2O5 3.25, H2O 8.97, total 100.37 wt.%. The empirical formula for goldhillite based on O = 15 apfu is (Cu4.69Zn1.23)Σ5.92(As0.86P0.18O4)2(OH)5.61-H2O. The crystal structures of goldhillite and philipsburgite were determined using single-crystal X-ray diffraction data and refined to R1 = 0.054 (for 2365 I > 2σI reflections) and 0.052 (for 2308 I > 2σI reflections), respectively. Goldhillite is monoclinic, P21/c, a = 12.3573(5), b = 9.2325(3), c = 10.7163(4) Å, β = 97.346(4)°, V = 1212.59(8) Åand Z = 4. Philipsburgite is monoclinic, P21/c, a = 12.3095(9), b = 9.2276(3), c = 10.7195(3) Å, β = 97.137(7)°, V = 1208.16(10) Åand Z = 4. The strongest lines of the powder X-ray diffraction pattern of goldhillite [d, Å (I, %)(hkl)] are: 4.09 (28)(300), 3.41 (23)(12, 221, 311), 2.57 (100)(132, 11, 20), 2.17 (18)(42, 332), 1.95 (22)(432) and 1.54 (20)(13, 060). Goldhillite is named after its type locality, the Gold Hill mine, Tooele County, Utah, USA.
AB - Philipsburgite has been redefined as the intermediate member of the goldhillite-philipsburgite-kipushite isomorphous series with the ideal formula Cu5Zn[(AsO4)(PO4)](OH)6-H2O due to the site-selective As-P substitution. The new mineral goldhillite, ideally Cu5Zn(AsO4)2(OH)6-H2O [or Cu5Zn(AsO4)(AsO4)(OH)6-H2O], is the arsenate end-member of this series. Goldhillite occurs on fracture surfaces in a rock comprised mostly of quartz with iron hydroxides in association with mixite, cornwallite and conichalcite. Goldhillite forms transparent, bright emerald-green, tabular crystals with vitreous lustre, flattened on {100}, up to 1 mm across and in rosettes up to 1.5 mm. The mineral is brittle with uneven fracture and perfect cleavage on {100}; the Mohs hardness is 3.5. The calculated density for the holotype is 4.199 g cm-3. The Raman spectrum is consistent with the presence of H2O-molecules, OH-groups, AsO4 tetrahedra and traces of PO4. Electron microprobe analyses of goldhillite (H2O content based on the crystal structure) provided: CuO 48.91, ZnO 13.18, As2O5 26.06, P2O5 3.25, H2O 8.97, total 100.37 wt.%. The empirical formula for goldhillite based on O = 15 apfu is (Cu4.69Zn1.23)Σ5.92(As0.86P0.18O4)2(OH)5.61-H2O. The crystal structures of goldhillite and philipsburgite were determined using single-crystal X-ray diffraction data and refined to R1 = 0.054 (for 2365 I > 2σI reflections) and 0.052 (for 2308 I > 2σI reflections), respectively. Goldhillite is monoclinic, P21/c, a = 12.3573(5), b = 9.2325(3), c = 10.7163(4) Å, β = 97.346(4)°, V = 1212.59(8) Åand Z = 4. Philipsburgite is monoclinic, P21/c, a = 12.3095(9), b = 9.2276(3), c = 10.7195(3) Å, β = 97.137(7)°, V = 1208.16(10) Åand Z = 4. The strongest lines of the powder X-ray diffraction pattern of goldhillite [d, Å (I, %)(hkl)] are: 4.09 (28)(300), 3.41 (23)(12, 221, 311), 2.57 (100)(132, 11, 20), 2.17 (18)(42, 332), 1.95 (22)(432) and 1.54 (20)(13, 060). Goldhillite is named after its type locality, the Gold Hill mine, Tooele County, Utah, USA.
KW - As-P ordering
KW - Black Pine mine
KW - Gold Hill mine
KW - Kamariza mines
KW - Raman spectroscopy
KW - Silver Coin mine
KW - crystal structure
KW - goldhillite
KW - kipushite
KW - new mineral
KW - philipsburgite
UR - http://www.scopus.com/inward/record.url?scp=85130570658&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/cf627186-5616-364f-a80d-98510e4478cf/
U2 - 10.1180/mgm.2022.36
DO - 10.1180/mgm.2022.36
M3 - Article
AN - SCOPUS:85130570658
VL - 86
SP - 436
EP - 446
JO - Mineralogical Magazine
JF - Mineralogical Magazine
SN - 0026-461X
IS - 3
ER -
ID: 97204170