earth science

Kermesite

Kermesite 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 Kermesite rather than just read about it. In short: Kermesite (also known as antimony oxysulfide, red antimony, or purpur blende) is a mineral with the chemical formula Sb2S2O. Its color can range from cherry red to a dark red to a black.

Key takeaways

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

Reference excerpt

Kermesite (also known as antimony oxysulfide, red antimony, or purpur blende) is a mineral with the chemical formula Sb2S2O. Its color can range from cherry red to a dark red to a black. Kermesite is the result of partial oxidation between stibnite (Sb2S3) and other antimony oxides such as valentinite (Sb2O3) or stibiconite (Sb3O6(OH)). Under certain conditions with oxygenated fluids the transformation of all sulfur to oxygen would occur but kermesite occurs when that transformation is halted.

Mining and specimens Deposits of this mineral have been found all over the world, however notable deposits have been found in Braunsdorf, near Freiberg, Saxony, Germany; Pernek, Pezinok, and Pribram, Czechoslovakia; the Lac Nicolet mine, South Ham Township, Wolfe County, Quebec, Canada; Sombrerete, Zacatecas, Mexico; Santa Cruz and San Francisco mines, Poopo, Oruro, Bolivia; Que Que, Zimbabwe; Djebel Haminate, Algeria; Broken Hill, New South Wales, Australia; Mohave, Kern County, California and Burke, Shoshone County, Idaho.

History and uses Kermesite is named after a formerly used red dye, kermes (dye), and was so named because of the grainy reddish color the mineral often has. The name dates from 1832. Earlier in English (17th and 18th centuries) certain antimony compounds were called "kermes mineral" for the same reason. Kermesite or red antimony has been used as early as the Old Kingdom’s 6th Dynasty in ancient Egypt (c. 2345–2181 BCE) in lip cosmetics and in the 18th Dynasty Queen Hatshepsut (Maatkare) (1498–1483 BCE) negotiated with the Land of Punt for its colored antimony deposits. Besides stibnite, which was used for eye liner red, antimony is one of the oldest minerals used in cosmetics. Further archaeological evidence indicates that antimony levels were higher in ancient Egyptian female remains which had exposure to both antimony compounds (Bencze, 1994). Because of its color, the precipitate of kermesite was used as a coloring agent and in alchemy. Because of alchemy’s focus on material transformation as evidenced by color, red antimony was used to produce the red state. Kermesite is the mineral state for Kermes mineral which was used extensively in the medical field for centuries Presently, kermesite is collected for the beauty of its crystal metallic structure and not used in either cosmetics or the medical field any longer due to the toxic effects that it shares with antimony; less harmful substitutes have been found using both organic and pharmaceutical production.

References

Bencze, Koloman. “Antimony” pp. 227–235. Handbook on Metals in Clinical and Analytical Chemistry (ed.) Hans G Seiler (1994) ISBN 0-8247-9094-4 Sneader, Walter. Drug Discovery: A History (2005). ISBN 0-471-89980-1

External links Mineral Gallery Kermesite at the Smithsonian

Illustrations

Worked examples

Example 1 — a first encounter with Kermesite

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

In research: Kermesite 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 Kermesite 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: Kermesite is common in secondary-school and first-year university syllabi. It links to neighbouring topics Antimony minerals, Blendes, Hatshepsut, so understanding it makes those chapters shorter.
In everyday life: Look for Kermesite 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 Kermesite in 20 minutes

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

Frequently asked questions

What is Kermesite in simple terms?

Kermesite (also known as antimony oxysulfide, red antimony, or purpur blende) is a mineral with the chemical formula Sb2S2O. Its color can range from cherry red to a dark red to a black.

Why does Kermesite 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 Kermesite?

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 Kermesite.