Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single Crystals

Type-II Na<sub>24</sub>Si<sub>136</sub> clathrate octahedral single crystals surrounded by {111} facets were grown by evaporating Na from a molten mixture of Na<sub>4</sub>Si<sub>4</sub> and Na<sub>9</sub>Sn<sub>4</sub> at 823 K...

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Main Authors: Haruhiko Morito, Hisanori Yamane, Rie Y. Umetsu, Kozo Fujiwara
Format: Article
Language:English
Published: MDPI AG 2021-07-01
Series:Crystals
Subjects:
Online Access:https://www.mdpi.com/2073-4352/11/7/808
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author Haruhiko Morito
Hisanori Yamane
Rie Y. Umetsu
Kozo Fujiwara
author_facet Haruhiko Morito
Hisanori Yamane
Rie Y. Umetsu
Kozo Fujiwara
author_sort Haruhiko Morito
collection DOAJ
description Type-II Na<sub>24</sub>Si<sub>136</sub> clathrate octahedral single crystals surrounded by {111} facets were grown by evaporating Na from a molten mixture of Na<sub>4</sub>Si<sub>4</sub> and Na<sub>9</sub>Sn<sub>4</sub> at 823 K for 12 h. One of the obtained single crystals was used as a seed for the following single crystal growth of the type-II clathrate using the same method. The single crystal grown on the seed maintained the octahedral shape. The weight of the crystal grown with the seed was increased from 0.6 to 30.4 mg by repeating the seeded growth and was proportional to the surface area of the seed crystal.
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spelling doaj.art-ff51a85ab58944e391a05f3332cb0cf22023-11-22T03:33:25ZengMDPI AGCrystals2073-43522021-07-0111780810.3390/cryst11070808Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single CrystalsHaruhiko Morito0Hisanori Yamane1Rie Y. Umetsu2Kozo Fujiwara3Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanInstitute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanInstitute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, JapanType-II Na<sub>24</sub>Si<sub>136</sub> clathrate octahedral single crystals surrounded by {111} facets were grown by evaporating Na from a molten mixture of Na<sub>4</sub>Si<sub>4</sub> and Na<sub>9</sub>Sn<sub>4</sub> at 823 K for 12 h. One of the obtained single crystals was used as a seed for the following single crystal growth of the type-II clathrate using the same method. The single crystal grown on the seed maintained the octahedral shape. The weight of the crystal grown with the seed was increased from 0.6 to 30.4 mg by repeating the seeded growth and was proportional to the surface area of the seed crystal.https://www.mdpi.com/2073-4352/11/7/808clathratesiliconsodiumseed-crystal growthsingle crystal
spellingShingle Haruhiko Morito
Hisanori Yamane
Rie Y. Umetsu
Kozo Fujiwara
Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single Crystals
Crystals
clathrate
silicon
sodium
seed-crystal growth
single crystal
title Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single Crystals
title_full Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single Crystals
title_fullStr Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single Crystals
title_full_unstemmed Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single Crystals
title_short Seeded Growth of Type-II Na<sub>24</sub>Si<sub>136</sub> Clathrate Single Crystals
title_sort seeded growth of type ii na sub 24 sub si sub 136 sub clathrate single crystals
topic clathrate
silicon
sodium
seed-crystal growth
single crystal
url https://www.mdpi.com/2073-4352/11/7/808
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