Sodium arsenideSodium arsenide, also known as trisodium arsenide, is the inorganic compound of sodium and arsenic with the formula Na3As. It is a dark colored solid that degrades upon contact with water or air. The compound is mainly of interest as exhibiting an archetypal structure. The normal pressure "sodium arsenide" phase is adopted by many alkali metal pnictides. At 3.6 GPa (520,000 psi), Na3As adopts the Li3Bi structure, which is another archetypal structure.
Alkali metalGroup of highly reactive chemical elementsnoble gases ← → alkaline earth metalsFrancium is here represented by Uraninite (uranium ore mostly composed of uranium dioxide (UO2), which contains U, which then decays into francium among other things.
Alkaline earth metalGroup of chemical elementsalkali metals ← → group 3The alkaline earth metals are six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). The elements have very similar properties: they are all shiny, silvery-white, somewhat reactivemetals, and they are less reactive than the alkali metals at standard temperature and pressure.
Gallium arsenideGallium arsenide (GaAs) is a III-Vdirect band gapsemiconductor with a zinc blende crystal structure. Gallium arsenide is used in the manufacture of devices such as microwave frequency integrated circuits, monolithic microwave integrated circuits, infraredlight-emitting diodes, laser diodes, solar cells and optical windows.
ArsineNames IUPAC namesArsenic trihydrideArsaneTrihydridoarsenicOther names Arseniuretted hydrogen,Arsenous hydride,Hydrogen arsenideArsenic hydrideIdentifiers CAS Number7784-42-13D model (JSmol)Interactive imageChEBICHEBI:47217ChEMBLChEMBL1231052ChemSpider22408ECHA InfoCard100.029.151EC Number232-066-3Gmelin Reference599 KEGGC06269PubChemCID23969RTECS numberCG6475000UNIIV1I29R0RJQUN number2188 CompTox Dashboard(EPA)DTXSID3023760InChIInChI=1S/AsH3/h1H3Key: RBFQJDQYXXHULB-UHFFFAOYSA-NInChI=1/AsH3/h1H3Key: RBFQJDQYXXHULB-UHFFFAOYAHSMILES[AsH3]Properties Chemical formulaAsH3Molar mass77.9454g/mol Appearance Colourless gas OdorFaint, garlic-like Density4.93g/L, gas; 1.640g/mL (−64 °C) Melting point−111.2 °C (−168.2 °F; 162.0 K) Boiling point−62.5 °C (−80.5 °F; 210.7 K) Solubility in water0.2g/100mL (20 °C)0.07g/100mL (25 °C) Solubilitysoluble in chloroform, benzeneVapor pressure14.9atm Conjugate acidArsoniumStructure Molecular shapeTrigonal pyramidal Dipole moment0.20DThermochemistry Std molarentropy(S298)223J⋅K⋅mol Std enthalpy offormation(ΔfH298)+66.4kJ/mol Hazards Occupational safety and health (OHS/OSH): Main hazardsExtremely toxic, explosive, flammable, potential occupational carcinogen GHS labelling: PictogramsSignal wordDangerHazard statementsH220, H330, H373, H410Precautionary statementsP210, P260, P271, P273, P284, P304+P340, P310, P314, P320, P377, P381, P391, P403, P403+P233, P405, P501NFPA 704 (fire diamond) 442Flash point−62 °C (−80 °F; 211 K) Explosive limits5.1–78% Lethal dose or concentration (LD, LC): LD50 (median dose)2.5mg/kg (intravenous) LC50 (median concentration)120ppm (rat, 10min)77ppm (mouse, 10min)201ppm (rabbit, 10min)108ppm (dog, 10min)LCLo (lowest published)250ppm (human, 30min)300ppm (human, 5min)25ppm (human, 30min)NIOSH (US health exposure limits): PEL (Permissible)TWA 0.05ppm (0.2mg/m) REL (Recommended)C 0.002mg/m [15-minute] IDLH (Immediate danger)3ppm Related compounds Related hydridesAmmoniaPhosphineStibineBismuthineRelated compoundsHydrogen selenideSupplementary data page Arsine (data page)Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Nverify ( ?)
PhosphideIn chemistry, a phosphide is a compound containing the P ion or its equivalent. Many different phosphides are known, with widely differing structures. Most commonly encountered on the binary phosphides, i.e. those materials consisting only of phosphorus and a less electronegative element. Numerous are polyphosphides, which are solids consisting of anionic chains or clusters of phosphorus.
ArsenicArsenic is a chemical element; it has the symbol As and atomic number 33. It is a metalloid and one of the pnictogens, and therefore shares many properties with its group 15 neighbors phosphorus and antimony. Arsenic is notoriously toxic. It occurs naturally in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. It has various allotropes, but only the grey form, which has a metallic appearance, is important to industry.
StoichiometryStoichiometry () is the relationships between the quantities of reactants and products before, during and after chemical reactions. Stoichiometry is based on the law of conservation of mass; the total mass of reactants must equal the total mass of products, so the relationship between reactants and products must form a ratio of positive integers. This means that if the amounts of the separate reactants are known, then the amount of the product can be calculated.
Boron groupgroup 12 ← → carbon groupThe boron group are the chemical elements in group 13 of the periodic table, consisting of boron (B), aluminium (Al), gallium (Ga), indium (In), thallium (Tl) and nihonium (Nh). This group lies in the p-block of the periodic table. The elements in the boron group are characterized by having three valence electrons. These elements have also been referred to as the triels. Several group 13 elements have biological roles in the ecosystem.
ElectronegativityElectronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons (or electron density) when forming a chemical bond. An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity, the more an atom or a substituent group attracts electrons.
Binary phaseIn materials chemistry, a binary phase or binary compound is a chemical compound containing two different elements. Some binary phase compounds are molecular, e.g. carbon tetrachloride (CCl4). More typically binary phase refers to extended solids. Famous examples zinc sulfide, which contains zinc and sulfur, and tungsten carbide, which contains tungsten and carbon.
Cubic crystal systemIn crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.*As an Amazon Associate I earn from qualifying purchases.