A niobium alloy is produced by introducing tungsten substitutional atoms into the BCC structure; eventually an alloy is produced that has a lattice parameter of 0.32554 nm and a density of 11.95 g/cm³. Calculate the fraction of the atoms in the alloy that are tungsten. The molar mass of tungsten is 183.84 g/mol and that of niobium is 92.91 g/mol. [Hint: [Density of alloy = {(no. of substitutional atoms in unit cell)(Molar mass of substitutional atom) + (no. of native atoms that should be in unit cell without substitution - no. of substitutional atoms in unit cell) (Molar mass of the native atom))/((Volume of unit cell) (Avogadro Number)}] Answer: 0.344

A niobium alloy is produced by introducing tungsten substitutional atoms into the BCC structure; eventually an alloy is produced that has a lattice parameter of 0.32554 nm and a density of 11.95 g/cm³. Calculate the fraction of the atoms in the alloy that are tungsten. The molar mass of tungsten is 183.84 g/mol and that of niobium is 92.91 g/mol. [Hint: [Density of alloy = {(no. of substitutional atoms in unit cell)(Molar mass of substitutional atom) + (no. of native atoms that should be in unit cell without substitution - no. of substitutional atoms in unit cell) (Molar mass of the native atom))/((Volume of unit cell) (Avogadro Number)}] Answer: 0.344

Chemistry

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Chapter1: Chemical Foundations

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Crystallography

Crystallography is the category of science that focuses on the atomic and molecular arrangements with their bonding constituting the crystal structure. It is derived experimentally and originated in the year 1912. It is a combination of two words; those are crystal, meaning a cold drop, and graph, meaning writing.

Question

A niobium alloy is produced by introducing tungsten substitutional atoms into the BCC structure;
eventually an alloy is produced that has a lattice parameter of 0.32554 nm and a density of 11.95 g/cm³.
Calculate the fraction of the atoms in the alloy that are tungsten. The molar mass of tungsten is 183.84
g/mol and that of niobium is 92.91 g/mol. [Hint: [Density of alloy = {(no. of substitutional atoms in unit
cell) (Molar mass of substitutional atom) + (no. of native atoms that should be in unit cell without
substitution no. of substitutional atoms in unit cell)(Molar mass of the native atom))/((Volume of unit
cell) (Avogadro Number)}}
Answer: 0.344

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