Research output: Contribution to journal › Article › peer-review
Karlditmarite, Cu9O4(PO4)2(SO4)2, the first copper phosphate-sulfate mineral from the Tolbachik volcano. / Сийдра, Олег Иоханнесович; Назарчук, Евгений Васильевич; Паутов, Л.А.; Борисов, Артем Сергеевич; Зайцев, Анатолий Николаевич; Авдонцева, Евгения Юрьевна.
In: American Mineralogist, 05.11.2025.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Karlditmarite, Cu9O4(PO4)2(SO4)2, the first copper phosphate-sulfate mineral from the Tolbachik volcano
AU - Сийдра, Олег Иоханнесович
AU - Назарчук, Евгений Васильевич
AU - Паутов, Л.А.
AU - Борисов, Артем Сергеевич
AU - Зайцев, Анатолий Николаевич
AU - Авдонцева, Евгения Юрьевна
PY - 2025/11/5
Y1 - 2025/11/5
N2 - Karlditmarite (IMA 2021-003), Cu9O4(PO4)2(SO4)2, is a new mineral species from an active Arsenatnaya fumarole, Tolbachik volcano, Kamchatka peninsula. Karlditmarite occurs as green prismatic crystals. The mineral is biaxial (−), with α = 1.872(2), β = 1.835(3), and γ = 1.810(3) (589 nm). Under the microscope, karlditmarite is green with weak pleochroism. Electron microprobe analysis provided the empirical formula (Cu8.614Zn0.175Al0.053Ca0.019Fe0.157)(P1.574S1.814As0.444V0.109Si0.059)O20. Karlditmarite is triclinic, P−1: a = 6.1256(7) Å, b = 7.9192(8) Å, c = 7.9866(8) Å, α = 75.173(2)°, β = 86.639(2)°, γ = 88.660(2)°, V = 373.87(7). The crystal structure (R1 = 0.039) is unique. The [Cu9O4]10+∞2 layer in karlditmarite can be described as composed of six-membered rings, in which two of the six OCu4 tetrahedra share a common edge. The interlayer space between the bends of the highly corrugated [Cu9O4]10+∞2 layers hosts phosphate tetrahedra, whereas sulfate tetrahedra are placed above the centers of the rings. Karlditmarite is the first anhydrous Cu phosphate-sulfate mineral among more than one hundred copper oxysalt mineral species known from the active fumaroles.Phosphorus geochemistry in fumarolic environments is discussed.
AB - Karlditmarite (IMA 2021-003), Cu9O4(PO4)2(SO4)2, is a new mineral species from an active Arsenatnaya fumarole, Tolbachik volcano, Kamchatka peninsula. Karlditmarite occurs as green prismatic crystals. The mineral is biaxial (−), with α = 1.872(2), β = 1.835(3), and γ = 1.810(3) (589 nm). Under the microscope, karlditmarite is green with weak pleochroism. Electron microprobe analysis provided the empirical formula (Cu8.614Zn0.175Al0.053Ca0.019Fe0.157)(P1.574S1.814As0.444V0.109Si0.059)O20. Karlditmarite is triclinic, P−1: a = 6.1256(7) Å, b = 7.9192(8) Å, c = 7.9866(8) Å, α = 75.173(2)°, β = 86.639(2)°, γ = 88.660(2)°, V = 373.87(7). The crystal structure (R1 = 0.039) is unique. The [Cu9O4]10+∞2 layer in karlditmarite can be described as composed of six-membered rings, in which two of the six OCu4 tetrahedra share a common edge. The interlayer space between the bends of the highly corrugated [Cu9O4]10+∞2 layers hosts phosphate tetrahedra, whereas sulfate tetrahedra are placed above the centers of the rings. Karlditmarite is the first anhydrous Cu phosphate-sulfate mineral among more than one hundred copper oxysalt mineral species known from the active fumaroles.Phosphorus geochemistry in fumarolic environments is discussed.
UR - https://pubs.geoscienceworld.org/msa/ammin/article/doi/10.2138/am-2025-9994/666406/Karlditmarite-Cu9O4-PO4-2-SO4-2-the-first-copper
UR - https://www.mendeley.com/catalogue/ce96b879-471b-3095-9ef2-4d3e9f9b4e35/
U2 - 10.2138/am-2025-9994
DO - 10.2138/am-2025-9994
M3 - Article
JO - American Mineralogist
JF - American Mineralogist
SN - 0003-004X
ER -
ID: 148625347