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関連する概念動画

Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
Regulation of Sodium and Potassium01:26

Regulation of Sodium and Potassium

The regulation of sodium and potassium ion concentrations in the human body is a complex process governed primarily by hormones such as aldosterone, antidiuretic hormone (ADH), and atrial natriuretic peptide (ANP).
Sodium Regulation
Sodium ions make up approximately 90% of extracellular cations, with a normal blood plasma concentration of 136–148 mEq/L. A decrease in blood volume and pressure triggers the release of renin from granular cells in the juxtaglomerular complex (JGC), primarily in...
Roles of Electrolytes: Sodium and Potassium01:24

Roles of Electrolytes: Sodium and Potassium

Sodium plays a crucial role in maintaining fluid and electrolyte balance and overall bodily homeostasis. Sodium balance is primarily regulated by kidney function, which adjusts sodium elimination to match dietary intake and maintain proper electrolyte levels. Sodium is the most abundant cation in the extracellular fluid (ECF) and is found in salts such as sodium chloride (NaCl) and sodium bicarbonate (NaHCO3). Although cellular plasma membranes are relatively impermeable to sodium, its role in...
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions.
Elements and Compounds01:27

Elements and Compounds

Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond.ElementsElements are classified as atomic or molecular based on the nature of their basic units. They are unique forms of matter with specific chemical and physical properties that cannot break down into smaller substances by ordinary chemical reactions. There...

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関連する実験動画

Updated: Jul 5, 2026

Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion
08:53

Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion

Published on: January 30, 2018

ナトリウムの構造的多様性

Eugene Gregoryanz1, Lars F Lundegaard, Malcolm I McMahon

  • 1School of Physics and Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh EH9 3JZ, UK. e.gregoryanz@ed.ac.uk

Science (New York, N.Y.)
|May 24, 2008
PubMed
まとめ

ナトリウムは最低の融解温度で約118ギガパスカルの温度を示しています. これは7つの結晶相と関連しており,極端な圧力および温度条件下での複雑な振る舞いを明らかにしています.

科学分野:

  • マテリアルサイエンス 材料科学
  • 凝縮物質物理学 凝縮物質物理学
  • 高圧科学とは,高圧科学である.

背景:

  • 高圧下でのナトリウムの相態度は完全に理解されていません.
  • 以前の研究では複雑な構造が示唆されていたが,詳細な段階マッピングが欠けていた.

研究 の 目的:

  • 極度の圧力下でのナトリウムの融解曲線を調査するために.
  • 100ギガパスカル以上のナトリウムの結晶相と構造的移行を特定するために.

主な方法:

  • 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion. 高圧下での単結晶X線 difraktion.
  • 圧力と温度を正確に制御し,測定する.

主要な成果:

  • ナトリウムの融解温度は118ギガパスカルの近くで顕著な最小値が観測されました.
  • この最小値の近くに7つの異なる結晶相が特定されました.
  • 数多くの構造的移行は,軽微な圧力と温度の変化によって引き起こされました.

さらに関連する動画

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

関連する実験動画

Last Updated: Jul 5, 2026

Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion
08:53

Synthesizing Sodium Tungstate and Sodium Molybdate Microcapsules via Bacterial Mineral Excretion

Published on: January 30, 2018

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

結論:

  • 溶解曲線の最小値は,複雑なナトリウム相と関連しています.
  • 極端な条件では,ナトリウムの異常な固体状態と液体状態が明らかになる.
  • この発見は,圧力下にある他の単純な金属を理解するための意味を持つ.