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@article{2301543,
author = {Kasatkin, Anatoly V. and Pekov, Igor V. and Škoda, Radek and Chukanov, Nikita V. and Nestola, Fabrizio and Agakhanov, Atali A. and Kuznetsov, Aleksey M. and Koshlyakova, Natalia N. and Plášil, Jakub and Britvin, Sergey N.},
article_number = {1},
doi = {http://dx.doi.org/10.3190/jgeosci.368},
keywords = {fluorpyromorphite; new mineral; apatite group; Sukhovyaz Mountain; Southern Urals; Tolbachik volcano},
language = {eng},
issn = {1802-6222},
journal = {Journal of Geosciences},
title = {Fluorpyromorphite, Pb5(PO4)3F, a new apatite-group mineral from Sukhovyaz Mountain, Southern Urals, and Tolbachik volcano, Kamchatka},
url = {http://doi.org/10.3190/jgeosci.368},
volume = {68},
year = {2023}
}
TY - JOUR
ID - 2301543
AU - Kasatkin, Anatoly V. - Pekov, Igor V. - Škoda, Radek - Chukanov, Nikita V. - Nestola, Fabrizio - Agakhanov, Atali A. - Kuznetsov, Aleksey M. - Koshlyakova, Natalia N. - Plášil, Jakub - Britvin, Sergey N.
PY - 2023
TI - Fluorpyromorphite, Pb5(PO4)3F, a new apatite-group mineral from Sukhovyaz Mountain, Southern Urals, and Tolbachik volcano, Kamchatka
JF - Journal of Geosciences
VL - 68
IS - 1
SP - 81-93
EP - 81-93
PB - Czech Geological Society
SN - 18026222
KW - fluorpyromorphite
KW - new mineral
KW - apatite group
KW - Sukhovyaz Mountain
KW - Southern Urals
KW - Tolbachik volcano
UR - http://doi.org/10.3190/jgeosci.368
N2 - Fluorpyromorphite, ideally Pb5(PO4)3F, a new apatite-group member, an F-dominant analog of pyromorphite and hydrox-ylpyromorphite. It is a supergene mineral found at two localities: Sukhovyaz Mountain, Ufaley District, Southern Urals (holotype) and Mountain 1004, Tolbachik volcano, Kamchatka (co-type), both in Russia. At Sukhovyaz, fluorpyromorphite forms anhedral grains up to 0.2 mm across (usually much smaller), filling cavities in quartz and sometimes partially replacing fluorapatite. Associated supergene minerals include pyromorphite, hydroxylpyromorphite, fluorphosphohedy-phane, mimetite, and nickeltsumcorite. At Tolbachik, fluorpyromorphite occurs in the oxidation zone of paleo-fumarolic deposits in close association with pyromorphite, fluorphosphohedyphane, wulfenite, cerussite, munakataite, vanadinite, chrysocolla, and opal. It forms crude long-prismatic to acicular crystals up to 0.1 mm long and up to 5 mu m thick com-bined in bunches and spherulites up to 0.2 mm. Fluorpyromorphite is colorless (Sukhovyaz) or yellow (Tolbachik), translucent to transparent and has a vitreous luster. It is brittle, with an uneven fracture and poor cleavage on (001). The calculated density values are 7.382 (holotype) and 6.831 (cotype) g/cm3. Fluorpyromorphite is optically uniaxial (-). In reflected light, it is light-grey, weakly anisotropic. The reflectance values (Rmin/Rmax, %) are: 15.8/16.6 (470 nm), 16.2/17.2 (546 nm), 15.9/16.9 (589 nm), 15.4/16.2 (650 nm). The chemical composition is (electron microprobe, wt. %; holotype/co-type): CaO 0.10/3.16, SrO 0.17/0.00, PbO 83.51/77.39, P2O516.13/16.35, CrO3 0.00/0.49, SeO3 0.00/0.98, F 1.00/1.35, Cl 0.29/0.40, H2Ocalc 0.13/0.00, -O=(F,Cl) -0.49/-0.66, total 100.84/99.46. The empirical formulae based on 13 anions (O +F + Cl+OH)pfu are Pb4.95Ca0.02Sr0.02P3.00O12F0.70(OH)0.19Cl0.11 (holotype) and Pb4.26Ca0.69P2.83Se6+0.09Cr6+0.06 O11.99F0.87Cl0.14 (co-type). Fluorpyromorphite is hexagonal, space group P63/m, unit-cell parameters (from powder X-ray diffraction data; holotype / co-type) are: a = 9.779(5) / 9.732(1), c = 7.241(9) / 7.242(1) angstrom, V = 599.6(7) / 594.0(2) angstrom 3, and Z = 2. The crystal structure was refined using the Rietveld method to Rp= 0.1764 (holotype). Fluorpyromorphite is isostructural with other members of the apatite group, a subdivision of the apatite supergroup.
ER -
KASATKIN, Anatoly V., Igor V. PEKOV, Radek ŠKODA, Nikita V. CHUKANOV, Fabrizio NESTOLA, Atali A. AGAKHANOV, Aleksey M. KUZNETSOV, Natalia N. KOSHLYAKOVA, Jakub PLÁŠIL and Sergey N. BRITVIN. Fluorpyromorphite, Pb5(PO4)3F, a new apatite-group mineral from Sukhovyaz Mountain, Southern Urals, and Tolbachik volcano, Kamchatka. \textit{Journal of Geosciences}. Czech Geological Society, 2023, vol.~68, No~1, p.~81-93. ISSN~1802-6222. Available from: https://dx.doi.org/10.3190/jgeosci.368.
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