earth science

Ilvaite

Ilvaite is a earth science 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 Ilvaite rather than just read about it. In short: Ilvaite is a sorosilicate of iron and calcium with formula: CaFe2+2Fe3+Si2O7O(OH). Both manganese and magnesium substitute in the structure.

Key takeaways

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

Reference excerpt

Ilvaite is a sorosilicate of iron and calcium with formula: CaFe2+2Fe3+Si2O7O(OH). Both manganese and magnesium substitute in the structure. Ilvaite crystallizes in the monoclinic system in black prismatic crystals and columnar masses. It is black to brownish black to gray and opaque. It has a Mohs hardness of 5.5 to 6 and a specific gravity of 3.8 to 4.1. Ilvaite is structurally related to lawsonite. It occurs in contact metamorphic rocks and skarn ore deposits. It also occurs less commonly in syenites. Ilvaite was first described in 1811 on the island of Elba and the name ilvaite from the Latin name Ilva of the island. Sometimes referred to as yenite.

References

Illustrations

Worked examples

Example 1 — a first encounter with Ilvaite

Start with the simplest possible case. Write down what Ilvaite claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, 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 Ilvaite 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 Ilvaite 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 Ilvaite

In research: Ilvaite appears in earth science 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 Ilvaite 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: Ilvaite is common in secondary-school and first-year university syllabi. It links to neighbouring topics Calcium minerals, Iron(II,III) minerals, Minerals in space group 14, so understanding it makes those chapters shorter.
In everyday life: Look for Ilvaite 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 Ilvaite in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ilvaite 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 Ilvaite out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ilvaite in simple terms?

Ilvaite is a sorosilicate of iron and calcium with formula: CaFe2+2Fe3+Si2O7O(OH). Both manganese and magnesium substitute in the structure.

Why does Ilvaite matter?

Because it connects several earth science 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 Ilvaite?

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 Ilvaite.