earth science

Schreibersite

Schreibersite 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 Schreibersite rather than just read about it. In short: Schreibersite is generally a rare iron nickel phosphide mineral, (Fe,Ni)3P, though common in iron-nickel meteorites. It has been found on Disko Island in Greenland and Illinois.

Key takeaways

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

Reference excerpt

Schreibersite is generally a rare iron nickel phosphide mineral, (Fe,Ni)3P, though common in iron-nickel meteorites. It has been found on Disko Island in Greenland and Illinois. Another name used for the mineral is rhabdite. It forms tetragonal crystals with perfect 001 cleavage. Its color ranges from bronze to brass yellow to silver white. It has a density of 7.5 and a hardness of 6.5 – 7. It is opaque with a metallic luster and a dark gray streak. It was named after the Austrian scientist Carl Franz Anton Ritter von Schreibers (1775–1852), who was one of the first to describe it from iron meteorites. Schreibersite is reported from the Magura Meteorite, Arva-(present name – Orava), Slovak Republic; the Sikhote-Alin Meteorite in eastern Russia; the São Julião de Moreira Meteorite, Viana do Castelo, Portugal; the Gebel Kamil (meteorite) in Egypt; and numerous other locations including the Moon. In 2007, researchers reported that schreibersite and other meteoric phosphorus bearing minerals may be the ultimate source for the phosphorus that is so important for life on Earth. In 2013, researchers reported that they had successfully produced pyrophosphite, a possible precursor to pyrophosphate, the molecule associated with ATP, a co-enzyme central to energy metabolism in all life on Earth. Their experiment consisted of subjecting a sample of schreibersite to a warm, acidic environment typically found in association with volcanic activity, activity that was far more common on the primordial Earth. They hypothesized that their experiment might represent what they termed "chemical life", a stage of evolution which may have led to the emergence of fully biological life as exists today. Lightning strikes may have provided an alternative source of reduced phosphorus species for the synthesis of early biomolecules.

See also Glossary of meteoritics List of minerals List of minerals named after people

References

External links Media related to Schreibersite at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Schreibersite

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

In research: Schreibersite 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 Schreibersite 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: Schreibersite is common in secondary-school and first-year university syllabi. It links to neighbouring topics Disko Island, Iron minerals, Meteorite minerals, so understanding it makes those chapters shorter.
In everyday life: Look for Schreibersite 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 Schreibersite in 20 minutes

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

Frequently asked questions

What is Schreibersite in simple terms?

Schreibersite is generally a rare iron nickel phosphide mineral, (Fe,Ni)3P, though common in iron-nickel meteorites. It has been found on Disko Island in Greenland and Illinois.

Why does Schreibersite 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 Schreibersite?

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 Schreibersite.