chemistry

Neodymium nickelate

Neodymium nickelate is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Neodymium nickelate rather than just read about it. In short: Neodymium nickelate is a nickelate of neodymium with a chemical formula NdNiO3. In this compound, the neodymium atom is in the +3 oxidation state.

Key takeaways

Neodymium nickelate belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Neodymium nickelate to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Neodymium nickelate from memory before moving on to harder problems.

Reference excerpt

Neodymium nickelate is a nickelate of neodymium with a chemical formula NdNiO3. In this compound, the neodymium atom is in the +3 oxidation state.

Preparation Neodymium nickelate can be prepared by dissolving neodymium(III) oxide and nickel(II) oxide in nitric acid, followed by heating the mixture in an oxygen atmosphere. It can also be prepared by pyrolyzing a mixture of nickel nitrate and neodymium nitrate. It decomposes in high temperature (950 °C) by nitrogen:

4 NdNiO3 → 2 Nd2NiO4 + 2 NiO + O2 It can also be reduced to the monovalent nickel compound NdNiO2 by sodium hydride at 160 °C.

Physical properties Neodymium nickelate shows metal-insulator transition (MIT) under low temperature. The temperature at which it transforms (TMIT) is 200K, which is higher than praseodymium nickelate (130K) but lower than samarium nickelate (400K). It transforms from antiferromagnetism to paramagnetism. It has demonstrated to be a first-order phase transition (this applies for praseodymium nickelate as well). The temperature (TN) can be changed by varying the NiO6 octahedral distortion. It is the only lathanide nickelate to have the same TMIT as TN.

Uses In a 2010 study, it was found that neodymium nickelate as an anode material provided 1.7 times the current density of typical LSM anodes when integrated into a commercial SOEC and operated at 700 °C, and approximately 4 times the current density when operated at 800 °C. The increased performance is postulated to be due to higher "overstoichiometry" of oxygen in the neodymium nickelate, making it a successful conductor of both ions and electrons. Neodymium nickelate can also be used in electrocatalysts, synapse transistors, photovoltaics, memory resistors, biosensors, and electric-field sensors.

References

Illustrations

Worked examples

Example 1 — a first encounter with Neodymium nickelate

Start with the simplest possible case. Write down what Neodymium nickelate claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Neodymium nickelate before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Neodymium nickelate ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Neodymium nickelate

In research: Neodymium nickelate appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Neodymium nickelate in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Neodymium nickelate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Neodymium compounds, Nickel compounds, Perovskites, so understanding it makes those chapters shorter.
In everyday life: Look for Neodymium nickelate outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Neodymium nickelate in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Neodymium nickelate means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Neodymium nickelate out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Neodymium nickelate in simple terms?

Neodymium nickelate is a nickelate of neodymium with a chemical formula NdNiO3. In this compound, the neodymium atom is in the +3 oxidation state.

Why does Neodymium nickelate matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Neodymium nickelate?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Neodymium nickelate.