Formation of Interstitial Compounds
Characteristics and examples of interstitial compounds formed by transition metals.
What is Formation of Interstitial Compounds?
Compounds formed when small atoms of non-metals (like H, B, C, N) occupy the interstitial spaces or voids in the crystal lattice of transition metals.
Key points
- Explain the formation of interstitial compounds by transition metals.
- Identify the characteristics of interstitial compounds.
- Provide examples of common interstitial compounds.
- Differentiate interstitial compounds from other types of compounds.
Common exam trap
Assuming interstitial compounds are stoichiometric.
Definitions
- Term
Interstitial Compounds
- Meaning
Compounds formed when small atoms of non-metals (like H, B, C, N) occupy the interstitial spaces or voids in the crystal lattice of transition metals.
- Term
Non-stoichiometric Compounds
- Meaning
Compounds whose elemental composition cannot be represented by a ratio of small whole numbers, often due to defects or the incorporation of foreign atoms into the lattice.
Learning objectives
Explain the formation of interstitial compounds by transition metals.
Identify the characteristics of interstitial compounds.
Provide examples of common interstitial compounds.
Differentiate interstitial compounds from other types of compounds.
Prerequisites
Understanding of metallic bonding and crystal structures (BCC, FCC, HCP).
Knowledge of transition metal properties.
Familiarity with common non-metals (H, B, C, N).
Common mistakes
Assuming interstitial compounds are stoichiometric.
Confusing them with interstitial alloys where atoms are of similar size.
Overlooking the requirement for small non-metal atoms.
Forgetting that they retain metallic properties.
Keywords
Transition Metals
Interstitial Compounds
Non-stoichiometric
Hardness
High Melting Point
Tungsten Carbide
Titanium Nitride
Practice preview
Which of the following is NOT a characteristic of interstitial compounds formed by transition metals?…
easy
Which of the following properties are typically retained by interstitial compounds of transition metals?…
easy
Interstitial compounds formed by transition metals are generally:…
easy