earth science

József Sándor Krenner

József Sándor Krenner 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 József Sándor Krenner rather than just read about it. In short: József Sándor Krenner or Joseph Krenner (3 March 1839 – 6 January 1920) was a Hungarian mineralogist. He discovered several new minerals.

Key takeaways

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

Reference excerpt

József Sándor Krenner or Joseph Krenner (3 March 1839 – 6 January 1920) was a Hungarian mineralogist. He discovered several new minerals. Krenner was born in Buda and studied at the University of Pest, Vienna and Tübingen mineralogy and geology. He received his Ph.D. in 1865 for work with Friedrich August Quenstedt in Tübingen. Krenner worked in the mineralogy section of the Hungarian National Museum. From 1870 on he also lectured at the Technical University of Budapest. In 1888 he became a member of the Hungarian Academy of Science. Krenner discovered several new minerals, for example, Krennerite which he discovered in 1877 in Sacaramb, Romania. The mineral is obviously named after himself. Another mineral he discovered was Semseyite, the lead antimony sulfide discovered in 1881 was named after Andor Semsey (1833–1923), a Hungarian nobleman and mineralogist. He also discovered and described kornelite (1888), szomolnokite (1891) and rhomboclase (1891), all hydrated iron sulfates from Szomolnok (present-day Smolník, Slovakia).

References Benda: "Krenner, József Sándor". In: Österreichisches Biographisches Lexikon 1815–1950 (ÖBL). Vol. 4, Austrian Academy of Sciences, Vienna 1969, p. 259–25. Szendrei, Geza (1993). "A Brief History of the Mineralogical and Petrological Department of the Hungarian Natural History Museum" (PDF). Abhandlungen der Geologischen Bundesanstalt in Wien. 49: 163–167. ISSN 0378-0864. Archived from the original (PDF) on 2011-07-06. Retrieved 2011-02-13.

Worked examples

Example 1 — a first encounter with József Sándor Krenner

Start with the simplest possible case. Write down what József Sándor Krenner 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 József Sándor Krenner 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 József Sándor Krenner 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 József Sándor Krenner

In research: József Sándor Krenner 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 József Sándor Krenner 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: József Sándor Krenner is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1839 births, 1920 deaths, 19th-century Hungarian people, so understanding it makes those chapters shorter.
In everyday life: Look for József Sándor Krenner 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 József Sándor Krenner in 20 minutes

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

Frequently asked questions

What is József Sándor Krenner in simple terms?

József Sándor Krenner or Joseph Krenner (3 March 1839 – 6 January 1920) was a Hungarian mineralogist. He discovered several new minerals.

Why does József Sándor Krenner 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 József Sándor Krenner?

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 József Sándor Krenner.