Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data
—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 aggr...
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| creator | 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, R. Britvin, S. N. Pushcharovsky, D. Yu |
| description | —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,
D
meas
= 2.89(2) and
D
calc
= 2.875 g/cm
3
. 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 SiO
2
, 17.40 Al
2
O
3
, 8.58 BeO, 1.77 Na
2
O, 0.09 K
2
O, 6.44 Cs
2
O, 1.38 Rb
2
O, 2.51 Li
2
O, 0.42 H
2
O; the total is 99.63. The empirical formula is (Na
0.34
Cs
0.27
H
2
O
0.14
Rb
0.09
K
0.01
)
Σ0.85
(Be
2.04
Li
1.00
)
Σ3.04
Al
2.03
Si
6.03
O
18
. 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
(H
2
O)
y
]{(Be,Li)
3
(Al,
M
2+
)
2
Si
6
O
18
},
y
≤ 1,
R
' = Cs, Rb, K, Ca,
M
2+
= Fe, Mg, Mn. The crystal structure has been studied by single-crystal X-ray diffraction,
R
= 0.0322. The mineral is hexagonal, space group
P
6
/mcc
. The unit-cell parameters are:
a
= 9.2287(4) Å,
c
= 9.2610(3) Å,
V
= 683.07(5) Å
3
, and
Z
= 2. The strongest reflections of the XRD pattern are [
d
meas
, 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. |
| doi_str_mv | 10.1134/S1075701521070023 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_sprin</sourceid><recordid>TN_cdi_springer_journals_10_1134_S1075701521070023</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2631667133</sourcerecordid><originalsourceid>FETCH-LOGICAL-a339t-7ddb80cf39cc991579b2618baa7a3d4203795eccea5603cb20c68a7e379af76b3</originalsourceid><addsrcrecordid>eNqNkM1OwzAQhCMEEqXwANwscYSAHdd2wq20_ElQDgUOXKKNs0EpqVNst1XfHpciOCAkTh55vvF6J4oOGT1ljPfOxowqoSgTSRCUJnwr6jAhRCx7Sm4HHex47e9Ge85NKO2JhLJO9NJflIiL2uMJATKCeNhOawPGk37zBk1NLtCumnMyRI927fi6NQQceQ5mSe5rgxYaMp6hrtERMCUZ4ZIMwcN-tFNB4_Dg6-xGT1eXj4Ob-O7h-nbQv4uB88zHqiyLlOqKZ1pnGRMqKxLJ0gJAAS97CeUqE6g1gpCU6yKhWqagMFxDpWTBu9HR5t2Zbd_n6Hw-aefWhJF5IjmTUjHOA8U2lLatcxarfGbrKdhVzmi-rjD_VWHIHG8ySyzayoUNjcbvHKWBT1PFWFB0Taf_pwe1_6xy0M6ND9FkE3UBN69of1b4-3cflmyRsg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2631667133</pqid></control><display><type>article</type><title>Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data</title><source>SpringerNature Journals</source><source>Web of Science - Science Citation Index Expanded - 2021<img src="https://exlibris-pub.s3.amazonaws.com/fromwos-v2.jpg" /></source><creator>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, R. ; Britvin, S. N. ; Pushcharovsky, D. Yu</creator><creatorcontrib>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, R. ; Britvin, S. N. ; Pushcharovsky, D. Yu</creatorcontrib><description>—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,
D
meas
= 2.89(2) and
D
calc
= 2.875 g/cm
3
. 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 SiO
2
, 17.40 Al
2
O
3
, 8.58 BeO, 1.77 Na
2
O, 0.09 K
2
O, 6.44 Cs
2
O, 1.38 Rb
2
O, 2.51 Li
2
O, 0.42 H
2
O; the total is 99.63. The empirical formula is (Na
0.34
Cs
0.27
H
2
O
0.14
Rb
0.09
K
0.01
)
Σ0.85
(Be
2.04
Li
1.00
)
Σ3.04
Al
2.03
Si
6.03
O
18
. 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
(H
2
O)
y
]{(Be,Li)
3
(Al,
M
2+
)
2
Si
6
O
18
},
y
≤ 1,
R
' = Cs, Rb, K, Ca,
M
2+
= Fe, Mg, Mn. The crystal structure has been studied by single-crystal X-ray diffraction,
R
= 0.0322. The mineral is hexagonal, space group
P
6
/mcc
. The unit-cell parameters are:
a
= 9.2287(4) Å,
c
= 9.2610(3) Å,
V
= 683.07(5) Å
3
, and
Z
= 2. The strongest reflections of the XRD pattern are [
d
meas
, 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.</description><identifier>ISSN: 1075-7015</identifier><identifier>EISSN: 1555-6476</identifier><identifier>DOI: 10.1134/S1075701521070023</identifier><language>eng</language><publisher>Moscow: Pleiades Publishing</publisher><subject>Aluminum oxide ; Beryl ; Beryllium ; Beryllium aluminum silicates ; Beryllium compounds ; Cations ; Cesium oxides ; Chemical composition ; Crystal structure ; Crystals ; Earth and Environmental Science ; Earth Sciences ; Electron microprobe ; Electron probes ; Geology ; Holotypes ; Lithium oxides ; Manganese ; Mineral Resources ; Mineralogy ; New Minerals ; Pegmatite ; Physical Sciences ; Rubidium ; Science & Technology ; Scratch hardness ; Silica ; Silicon dioxide ; Single crystals ; Sodium ; Unit cell ; Water hardness ; X-ray diffraction</subject><ispartof>Geology of ore deposits, 2021-12, Vol.63 (7), p.654-667</ispartof><rights>Pleiades Publishing, Ltd. 2021. ISSN 1075-7015, Geology of Ore Deposits, 2021, Vol. 63, No. 7, pp. 654–667. © Pleiades Publishing, Ltd., 2021. Russian Text © The Author(s), 2020, published in Zapiski Rossiiskogo Mineralogicheskogo Obshchestva, 2020, No. 6, pp. 1–19.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>1</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wos000758871100003</woscitedreferencesoriginalsourcerecordid><citedby>FETCH-LOGICAL-a339t-7ddb80cf39cc991579b2618baa7a3d4203795eccea5603cb20c68a7e379af76b3</citedby><cites>FETCH-LOGICAL-a339t-7ddb80cf39cc991579b2618baa7a3d4203795eccea5603cb20c68a7e379af76b3</cites><orcidid>0000-0003-3183-7594 ; 0000-0001-6097-4294</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1134/S1075701521070023$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1134/S1075701521070023$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>315,782,786,27931,27932,39265,41495,42564,51326</link.rule.ids></links><search><creatorcontrib>Agakhanov, A. A.</creatorcontrib><creatorcontrib>Stepanenko, D. A.</creatorcontrib><creatorcontrib>Zubkova, N. V.</creatorcontrib><creatorcontrib>Pautov, L. A.</creatorcontrib><creatorcontrib>Pekov, I. V.</creatorcontrib><creatorcontrib>Kasatkin, A. V.</creatorcontrib><creatorcontrib>Karpenko, V. Yu</creatorcontrib><creatorcontrib>Agakhanova, V. A.</creatorcontrib><creatorcontrib>Škoda, R.</creatorcontrib><creatorcontrib>Britvin, S. N.</creatorcontrib><creatorcontrib>Pushcharovsky, D. Yu</creatorcontrib><title>Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data</title><title>Geology of ore deposits</title><addtitle>Geol. Ore Deposits</addtitle><addtitle>GEOL ORE DEPOSIT</addtitle><description>—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,
D
meas
= 2.89(2) and
D
calc
= 2.875 g/cm
3
. 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 SiO
2
, 17.40 Al
2
O
3
, 8.58 BeO, 1.77 Na
2
O, 0.09 K
2
O, 6.44 Cs
2
O, 1.38 Rb
2
O, 2.51 Li
2
O, 0.42 H
2
O; the total is 99.63. The empirical formula is (Na
0.34
Cs
0.27
H
2
O
0.14
Rb
0.09
K
0.01
)
Σ0.85
(Be
2.04
Li
1.00
)
Σ3.04
Al
2.03
Si
6.03
O
18
. 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
(H
2
O)
y
]{(Be,Li)
3
(Al,
M
2+
)
2
Si
6
O
18
},
y
≤ 1,
R
' = Cs, Rb, K, Ca,
M
2+
= Fe, Mg, Mn. The crystal structure has been studied by single-crystal X-ray diffraction,
R
= 0.0322. The mineral is hexagonal, space group
P
6
/mcc
. The unit-cell parameters are:
a
= 9.2287(4) Å,
c
= 9.2610(3) Å,
V
= 683.07(5) Å
3
, and
Z
= 2. The strongest reflections of the XRD pattern are [
d
meas
, 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.</description><subject>Aluminum oxide</subject><subject>Beryl</subject><subject>Beryllium</subject><subject>Beryllium aluminum silicates</subject><subject>Beryllium compounds</subject><subject>Cations</subject><subject>Cesium oxides</subject><subject>Chemical composition</subject><subject>Crystal structure</subject><subject>Crystals</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Electron microprobe</subject><subject>Electron probes</subject><subject>Geology</subject><subject>Holotypes</subject><subject>Lithium oxides</subject><subject>Manganese</subject><subject>Mineral Resources</subject><subject>Mineralogy</subject><subject>New Minerals</subject><subject>Pegmatite</subject><subject>Physical Sciences</subject><subject>Rubidium</subject><subject>Science & Technology</subject><subject>Scratch hardness</subject><subject>Silica</subject><subject>Silicon dioxide</subject><subject>Single crystals</subject><subject>Sodium</subject><subject>Unit cell</subject><subject>Water hardness</subject><subject>X-ray diffraction</subject><issn>1075-7015</issn><issn>1555-6476</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>HGBXW</sourceid><recordid>eNqNkM1OwzAQhCMEEqXwANwscYSAHdd2wq20_ElQDgUOXKKNs0EpqVNst1XfHpciOCAkTh55vvF6J4oOGT1ljPfOxowqoSgTSRCUJnwr6jAhRCx7Sm4HHex47e9Ge85NKO2JhLJO9NJflIiL2uMJATKCeNhOawPGk37zBk1NLtCumnMyRI927fi6NQQceQ5mSe5rgxYaMp6hrtERMCUZ4ZIMwcN-tFNB4_Dg6-xGT1eXj4Ob-O7h-nbQv4uB88zHqiyLlOqKZ1pnGRMqKxLJ0gJAAS97CeUqE6g1gpCU6yKhWqagMFxDpWTBu9HR5t2Zbd_n6Hw-aefWhJF5IjmTUjHOA8U2lLatcxarfGbrKdhVzmi-rjD_VWHIHG8ySyzayoUNjcbvHKWBT1PFWFB0Taf_pwe1_6xy0M6ND9FkE3UBN69of1b4-3cflmyRsg</recordid><startdate>20211201</startdate><enddate>20211201</enddate><creator>Agakhanov, A. A.</creator><creator>Stepanenko, D. A.</creator><creator>Zubkova, N. V.</creator><creator>Pautov, L. A.</creator><creator>Pekov, I. V.</creator><creator>Kasatkin, A. V.</creator><creator>Karpenko, V. Yu</creator><creator>Agakhanova, V. A.</creator><creator>Škoda, R.</creator><creator>Britvin, S. N.</creator><creator>Pushcharovsky, D. Yu</creator><general>Pleiades Publishing</general><general>Pleiades Publishing Inc</general><general>Springer Nature B.V</general><scope>BLEPL</scope><scope>DTL</scope><scope>HGBXW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><orcidid>https://orcid.org/0000-0003-3183-7594</orcidid><orcidid>https://orcid.org/0000-0001-6097-4294</orcidid></search><sort><creationdate>20211201</creationdate><title>Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data</title><author>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, R. ; Britvin, S. N. ; Pushcharovsky, D. Yu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a339t-7ddb80cf39cc991579b2618baa7a3d4203795eccea5603cb20c68a7e379af76b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Aluminum oxide</topic><topic>Beryl</topic><topic>Beryllium</topic><topic>Beryllium aluminum silicates</topic><topic>Beryllium compounds</topic><topic>Cations</topic><topic>Cesium oxides</topic><topic>Chemical composition</topic><topic>Crystal structure</topic><topic>Crystals</topic><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>Electron microprobe</topic><topic>Electron probes</topic><topic>Geology</topic><topic>Holotypes</topic><topic>Lithium oxides</topic><topic>Manganese</topic><topic>Mineral Resources</topic><topic>Mineralogy</topic><topic>New Minerals</topic><topic>Pegmatite</topic><topic>Physical Sciences</topic><topic>Rubidium</topic><topic>Science & Technology</topic><topic>Scratch hardness</topic><topic>Silica</topic><topic>Silicon dioxide</topic><topic>Single crystals</topic><topic>Sodium</topic><topic>Unit cell</topic><topic>Water hardness</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Agakhanov, A. A.</creatorcontrib><creatorcontrib>Stepanenko, D. A.</creatorcontrib><creatorcontrib>Zubkova, N. V.</creatorcontrib><creatorcontrib>Pautov, L. A.</creatorcontrib><creatorcontrib>Pekov, I. V.</creatorcontrib><creatorcontrib>Kasatkin, A. V.</creatorcontrib><creatorcontrib>Karpenko, V. Yu</creatorcontrib><creatorcontrib>Agakhanova, V. A.</creatorcontrib><creatorcontrib>Škoda, R.</creatorcontrib><creatorcontrib>Britvin, S. N.</creatorcontrib><creatorcontrib>Pushcharovsky, D. Yu</creatorcontrib><collection>Web of Science Core Collection</collection><collection>Science Citation Index Expanded</collection><collection>Web of Science - Science Citation Index Expanded - 2021</collection><collection>CrossRef</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Geology of ore deposits</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Agakhanov, A. A.</au><au>Stepanenko, D. A.</au><au>Zubkova, N. V.</au><au>Pautov, L. A.</au><au>Pekov, I. V.</au><au>Kasatkin, A. V.</au><au>Karpenko, V. Yu</au><au>Agakhanova, V. A.</au><au>Škoda, R.</au><au>Britvin, S. N.</au><au>Pushcharovsky, D. Yu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data</atitle><jtitle>Geology of ore deposits</jtitle><stitle>Geol. Ore Deposits</stitle><stitle>GEOL ORE DEPOSIT</stitle><date>2021-12-01</date><risdate>2021</risdate><volume>63</volume><issue>7</issue><spage>654</spage><epage>667</epage><pages>654-667</pages><issn>1075-7015</issn><eissn>1555-6476</eissn><abstract>—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,
D
meas
= 2.89(2) and
D
calc
= 2.875 g/cm
3
. 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 SiO
2
, 17.40 Al
2
O
3
, 8.58 BeO, 1.77 Na
2
O, 0.09 K
2
O, 6.44 Cs
2
O, 1.38 Rb
2
O, 2.51 Li
2
O, 0.42 H
2
O; the total is 99.63. The empirical formula is (Na
0.34
Cs
0.27
H
2
O
0.14
Rb
0.09
K
0.01
)
Σ0.85
(Be
2.04
Li
1.00
)
Σ3.04
Al
2.03
Si
6.03
O
18
. 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
(H
2
O)
y
]{(Be,Li)
3
(Al,
M
2+
)
2
Si
6
O
18
},
y
≤ 1,
R
' = Cs, Rb, K, Ca,
M
2+
= Fe, Mg, Mn. The crystal structure has been studied by single-crystal X-ray diffraction,
R
= 0.0322. The mineral is hexagonal, space group
P
6
/mcc
. The unit-cell parameters are:
a
= 9.2287(4) Å,
c
= 9.2610(3) Å,
V
= 683.07(5) Å
3
, and
Z
= 2. The strongest reflections of the XRD pattern are [
d
meas
, 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.</abstract><cop>Moscow</cop><pub>Pleiades Publishing</pub><doi>10.1134/S1075701521070023</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0003-3183-7594</orcidid><orcidid>https://orcid.org/0000-0001-6097-4294</orcidid></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1075-7015 |
| ispartof | Geology of ore deposits, 2021-12, Vol.63 (7), p.654-667 |
| issn | 1075-7015 1555-6476 |
| language | eng |
| recordid | cdi_springer_journals_10_1134_S1075701521070023 |
| source | SpringerNature Journals; Web of Science - Science Citation Index Expanded - 2021<img src="https://exlibris-pub.s3.amazonaws.com/fromwos-v2.jpg" /> |
| subjects | Aluminum oxide Beryl Beryllium Beryllium aluminum silicates Beryllium compounds Cations Cesium oxides Chemical composition Crystal structure Crystals Earth and Environmental Science Earth Sciences Electron microprobe Electron probes Geology Holotypes Lithium oxides Manganese Mineral Resources Mineralogy New Minerals Pegmatite Physical Sciences Rubidium Science & Technology Scratch hardness Silica Silicon dioxide Single crystals Sodium Unit cell Water hardness X-ray diffraction |
| title | Avdeevite, a Na-Dominant Alkali Beryl: Determination as Valid Mineral Species and New Data |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-04T15%3A42%3A54IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_sprin&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Avdeevite,%20a%20Na-Dominant%20Alkali%20Beryl:%20Determination%20as%20Valid%20Mineral%20Species%20and%20New%20Data&rft.jtitle=Geology%20of%20ore%20deposits&rft.au=Agakhanov,%20A.%20A.&rft.date=2021-12-01&rft.volume=63&rft.issue=7&rft.spage=654&rft.epage=667&rft.pages=654-667&rft.issn=1075-7015&rft.eissn=1555-6476&rft_id=info:doi/10.1134/S1075701521070023&rft_dat=%3Cproquest_sprin%3E2631667133%3C/proquest_sprin%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=2631667133&rft_id=info:pmid/&rfr_iscdi=true |