earth science

Sampleite

Sampleite 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 Sampleite rather than just read about it. In short: Sampleite has a general formula of NaCaCu5(PO4)4Cl·5(H2O). It was first described in 1942 for an occurrence in Chuquicamata, Chile and was named after Mat Sample, a mine superintendent for the Chile Exploration Company.

Key takeaways

Sampleite 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 Sampleite to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sampleite from memory before moving on to harder problems.

Reference excerpt

Sampleite has a general formula of NaCaCu5(PO4)4Cl·5(H2O). It was first described in 1942 for an occurrence in Chuquicamata, Chile and was named after Mat Sample, a mine superintendent for the Chile Exploration Company. Sampleite is monoclinic. It belongs to the space group P21/n or P21/c. In a thin section it has a high surface relief and will have sharp boundaries with the surrounding medium. Sampleite is anisotropic and has visible pleochroism and birefringence. It is characteristically found in earthy crusts in a highly sericitized rock and is present in highly oxidized conditions near the surface. When it occurs as micaceous rosettes and aggregates it can be associated with dendrites of manganese and iron oxides. Sampleite appears to be the most recent mineral deposited with the exception of gypsum.

References

External links Media related to Sampleite at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Sampleite

Start with the simplest possible case. Write down what Sampleite 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 Sampleite 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 Sampleite 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 Sampleite

In research: Sampleite 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 Sampleite 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: Sampleite is common in secondary-school and first-year university syllabi. It links to neighbouring topics Calcium minerals, Chloride minerals, Copper(II) minerals, so understanding it makes those chapters shorter.
In everyday life: Look for Sampleite 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 Sampleite in 20 minutes

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

Frequently asked questions

What is Sampleite in simple terms?

Why does Sampleite 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 Sampleite?

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 Sampleite.