Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid
Mineral Species and New Data

J 2021

Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data

AGAKHANOV, A. A.; D. A. STEPANENKO; N. V. ZUBKOVA; L. A. PAUTOV; I. V. PEKOV et. al.

Základní údaje

Originální název

Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data

Autoři

AGAKHANOV, A. A.; D. A. STEPANENKO; N. V. ZUBKOVA; L. A. PAUTOV; I. V. PEKOV; A. V. KASATKIN; V. Yu. KARPENKO; V. A. AGAKHANOVA; Radek ŠKODA; S. N. BRITVIN a D. Yu. PUSHCHAROVSKY

Vydání

Geology of Ore Deposits, Pleiades Publishing Inc, 2021, 1075-7015

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10504 Mineralogy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 0.679

Kód RIV

RIV/00216224:14310/21:00124535

Organizační jednotka

Přírodovědecká fakulta

DOI

https://doi.org/10.1134/S1075701521070023

UT WoS

000758871100003

EID Scopus

2-s2.0-85125420973

Klíčová slova anglicky

avdeevite; new mineral; alkali beryl; beryl group; crystal structure; granitic pegmatite; Kat Chay; Momeik; Myanmar

Štítky

14315010, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 14. 4. 2022 10:00, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

This paper describes the first Na-dominant member of the beryl group, named avdeevite. The sample, which became its holotype, was found in a granitic pegmatite at the Kat Chay (Palelni) mine near the town of Momeik, Kyaukme district, Shan State, Myanmar. Both avdeevite and beryl form sheaflike aggregates up to 4 cm, consisting of hexagonal prismatic crystals up to 1 сm long and up to 1 mm thick. These crystals consist of epitactically intergrown avdeevite (core) and beryl (rim). The new mineral is pink and transparent with vitreous luster. The Mohs hardness is 8, Dmeas = 2.89(2) and Dcalc = 2.875 g/cm3. Avdeevite is optically uniaxial (–), ω = 1.601(2), ε = 1.594(2); in transmitted light, the mineral is colorless and nonpleochroic. The chemical composition of holotype (electron microprobe, Be, Li and H by ion microprobe) is, wt %: 61.06 SiO2, 17.40 Al2O3, 8.58 BeO, 1.77 Na2O, 0.09 K2O, 6.44 Cs2O, 1.38 Rb2O, 2.51 Li2O, 0.42 H2O; the total is 99.63. The empirical formula is (Na0.34Cs0.27H2O0.14Rb0.09K0.01)Σ0.85(Be2.04Li1.00)Σ3.04Al2.03Si6.03O18. Taking into account the previously published data for samples with compositions corresponding to avdeevite, the simplified formula of this mineral may be most correctly written as: [(Na,R')0.5–1(H2O)y]{(Be,Li)3(Al,M2+)2Si6O18}, y ≤ 1, R' = Cs, Rb, K, Ca, M2+ = Fe, Mg, Mn. The crystal structure has been studied by single-crystal X-ray diffraction, R = 0.0322. The mineral is hexagonal, space group P6/mcc. The unit-cell parameters are: a = 9.2287(4) Å, c = 9.2610(3) Å, V = 683.07(5) Å3, and Z = 2. The strongest reflections of the XRD pattern are [dmeas, Å (I, %) (hkl)]: 7.96 (82) (100), 4.60 (31) (002), 3.99 (102) (200), 3.26 (100) (112), 3.02 (37) (202) (210), 2.866 (84) (211), 1.742 (19) (304) (410). Avdeevite belongs to the beryl structural type. This mineral differs from beryl sensu stricto in that the total large cations in channels exceeds 0.5 apfu and Na dominates among these cations. Avdeevite is named after Ivan Vasil’evich Avdeev (1818–1865), the renowned Russian chemist and mining engineer, who led the major studies of natural and synthetic beryllium compounds. The paper also contains data on the history of Na-bearing beryls including previously described samples, which correspond to avdeevite.

Citovat

AGAKHANOV, A. A.; D. A. STEPANENKO; N. V. ZUBKOVA; L. A. PAUTOV; I. V. PEKOV; A. V. KASATKIN; V. Yu. KARPENKO; V. A. AGAKHANOVA; Radek ŠKODA; S. N. BRITVIN a D. Yu. PUSHCHAROVSKY. Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data. Geology of Ore Deposits. Pleiades Publishing Inc, 2021, roč. 63, č. 7, s. 654-667. ISSN 1075-7015. Dostupné z: https://doi.org/10.1134/S1075701521070023.

@article{1847059,
   author = {Agakhanov, A. A. and Stepanenko, D. A. and Zubkova, N. V. and Pautov, L. A. and Pekov, I. V. and Kasatkin, A. V. and Karpenko, V. Yu. and Agakhanova, V. A. and Škoda, Radek and Britvin, S. N. and Pushcharovsky, D. Yu.},
   article_number = {7},
   doi = {https://doi.org/10.1134/S1075701521070023},
   keywords = {avdeevite; new mineral; alkali beryl; beryl group; crystal structure; granitic pegmatite; Kat Chay; Momeik; Myanmar},
   language = {eng},
   issn = {1075-7015},
   journal = {Geology of Ore Deposits},
   title = {Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data},
   url = {https://link.springer.com/article/10.1134/S1075701521070023},
   volume = {63},
   year = {2021}
}

TY  - JOUR
ID  - 1847059
AU  - Agakhanov, A. A. - Stepanenko, D. A. - Zubkova, N. V. - Pautov, L. A. - Pekov, I. V. - Kasatkin, A. V. - Karpenko, V. Yu. - Agakhanova, V. A. - Škoda, Radek - Britvin, S. N. - Pushcharovsky, D. Yu.
PY  - 2021
TI  - Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data
JF  - Geology of Ore Deposits
VL  - 63
IS  - 7
SP  - 654-667
EP  - 654-667
PB  - Pleiades Publishing Inc
SN  - 10757015
KW  - avdeevite
KW  - new mineral
KW  - alkali beryl
KW  - beryl group
KW  - crystal structure
KW  - granitic pegmatite
KW  - Kat Chay
KW  - Momeik
KW  - Myanmar
UR  - https://link.springer.com/article/10.1134/S1075701521070023
N2  - This paper describes the first Na-dominant member of the beryl group, named avdeevite. The sample, which became its holotype, was found in a granitic pegmatite at the Kat Chay (Palelni) mine near the town of Momeik, Kyaukme district, Shan State, Myanmar. Both avdeevite and beryl form sheaflike aggregates up to 4 cm, consisting of hexagonal prismatic crystals up to 1 сm long and up to 1 mm thick. These crystals consist of epitactically intergrown avdeevite (core) and beryl (rim). The new mineral is pink and transparent with vitreous luster. The Mohs hardness is 8, Dmeas = 2.89(2) and Dcalc = 2.875 g/cm3. Avdeevite is optically uniaxial (–), ω = 1.601(2), ε = 1.594(2); in transmitted light, the mineral is colorless and nonpleochroic. The chemical composition of holotype (electron microprobe, Be, Li and H by ion microprobe) is, wt %: 61.06 SiO2, 17.40 Al2O3, 8.58 BeO, 1.77 Na2O, 0.09 K2O, 6.44 Cs2O, 1.38 Rb2O, 2.51 Li2O, 0.42 H2O; the total is 99.63. The empirical formula is (Na0.34Cs0.27H2O0.14Rb0.09K0.01)Σ0.85(Be2.04Li1.00)Σ3.04Al2.03Si6.03O18. Taking into account the previously published data for samples with compositions corresponding to avdeevite, the simplified formula of this mineral may be most correctly written as: [(Na,R')0.5–1(H2O)y]{(Be,Li)3(Al,M2+)2Si6O18}, y ≤ 1, R' = Cs, Rb, K, Ca, M2+ = Fe, Mg, Mn. The crystal structure has been studied by single-crystal X-ray diffraction, R = 0.0322. The mineral is hexagonal, space group P6/mcc. The unit-cell parameters are: a = 9.2287(4) Å, c = 9.2610(3) Å, V = 683.07(5) Å3, and Z = 2. The strongest reflections of the XRD pattern are [dmeas, Å (I, %) (hkl)]: 7.96 (82) (100), 4.60 (31) (002), 3.99 (102) (200), 3.26 (100) (112), 3.02 (37) (202) (210), 2.866 (84) (211), 1.742 (19) (304) (410). Avdeevite belongs to the beryl structural type. This mineral differs from beryl sensu stricto in that the total large cations in channels exceeds 0.5 apfu and Na dominates among these cations. Avdeevite is named after Ivan Vasil’evich Avdeev (1818–1865), the renowned Russian chemist and mining engineer, who led the major studies of natural and synthetic beryllium compounds. The paper also contains data on the history of Na-bearing beryls including previously described samples, which correspond to avdeevite.
ER  -

AGAKHANOV, A. A.; D. A. STEPANENKO; N. V. ZUBKOVA; L. A. PAUTOV; I. V. PEKOV; A. V. KASATKIN; V. Yu. KARPENKO; V. A. AGAKHANOVA; Radek ŠKODA; S. N. BRITVIN a D. Yu. PUSHCHAROVSKY. Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data. \textit{Geology of Ore Deposits}. Pleiades Publishing Inc, 2021, roč.~63, č.~7, s.~654-667. ISSN~1075-7015. Dostupné z: https://doi.org/10.1134/S1075701521070023.

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