Research output: Contribution to journal › Article › peer-review
Sb-Rich Avicennite from the Khokhoy Gold Deposit (Aldan Shield, Russia). / Anisimova, Galina S.; Kondratieva, Larisa A.; Kardashevskaia, Veronika N.; Kasatkin, Anatoly V.; Gurzhiy, Vladislav V.
In: Minerals, Vol. 15, No. 12, 1294, 10.12.2025.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Sb-Rich Avicennite from the Khokhoy Gold Deposit (Aldan Shield, Russia)
AU - Anisimova, Galina S.
AU - Kondratieva, Larisa A.
AU - Kardashevskaia, Veronika N.
AU - Kasatkin, Anatoly V.
AU - Gurzhiy, Vladislav V.
PY - 2025/12/10
Y1 - 2025/12/10
N2 - Sb-rich avicennite (first discovery in Russia) was found at the Khokhoy gold deposit, 120 km west of Aldan, Aldan district, Republic of Sakha (Yakutia), Eastern Siberia, Russia. The mineral of critical metal thallium forms irregularly shaped grains up to 0.25 mm in size, in association with amgaite, weissbergite, goethite, gold, and unidentified Tl-bearing phases. Aggregates of colloform structure prevail, represented by rhythmic-, concentric-zonal, kidney-shaped, and spherulitic varieties. Avicennite is black in color, with metallic luster, and it fractures unevenly. No cleavage is observed. The density value of avicennite, obtained using its empirical formula and the unit cell parameters calculated from the powder X-ray diffraction data, is 8.548 g/cm3. In reflected light, avicennite is light gray and isotropic. Internal reflections are absent. Reflection is very low; the reflectivity curve is of mixed type with a small maximum in the blue part. Its chemical composition (average value on 10 analyses, wt.%): Tl2O3—85.36, V2O5—0.73, As2O5—0.85, Sb2O5—12.98, Total—99.92; It corresponds to the following empirical formula (calculation for three atoms of O): Tl1.40Sb5+0.30V5+0.03As5+0.03O3. The unit cell parameters calculated from the powder X-ray diffraction data are as follows: the mineral is cubic, a = 10.496(6) Å, V = 1156(2) Å3.
AB - Sb-rich avicennite (first discovery in Russia) was found at the Khokhoy gold deposit, 120 km west of Aldan, Aldan district, Republic of Sakha (Yakutia), Eastern Siberia, Russia. The mineral of critical metal thallium forms irregularly shaped grains up to 0.25 mm in size, in association with amgaite, weissbergite, goethite, gold, and unidentified Tl-bearing phases. Aggregates of colloform structure prevail, represented by rhythmic-, concentric-zonal, kidney-shaped, and spherulitic varieties. Avicennite is black in color, with metallic luster, and it fractures unevenly. No cleavage is observed. The density value of avicennite, obtained using its empirical formula and the unit cell parameters calculated from the powder X-ray diffraction data, is 8.548 g/cm3. In reflected light, avicennite is light gray and isotropic. Internal reflections are absent. Reflection is very low; the reflectivity curve is of mixed type with a small maximum in the blue part. Its chemical composition (average value on 10 analyses, wt.%): Tl2O3—85.36, V2O5—0.73, As2O5—0.85, Sb2O5—12.98, Total—99.92; It corresponds to the following empirical formula (calculation for three atoms of O): Tl1.40Sb5+0.30V5+0.03As5+0.03O3. The unit cell parameters calculated from the powder X-ray diffraction data are as follows: the mineral is cubic, a = 10.496(6) Å, V = 1156(2) Å3.
KW - Carlin-type
KW - Khokhoy gold deposit
KW - Sb-rich avicennite
KW - amgaite
KW - avicennite
KW - colloform structures
KW - critical metal thallium
KW - gold
KW - thallium minerals
UR - https://www.mendeley.com/catalogue/4b3a171f-b4ec-3778-8633-006cea4bb194/
U2 - 10.3390/min15121294
DO - 10.3390/min15121294
M3 - статья
VL - 15
JO - Minerals
JF - Minerals
SN - 2075-163X
IS - 12
M1 - 1294
ER -
ID: 147476286