science

Selenophosphate

Selenophosphate is a 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 Selenophosphate rather than just read about it. In short: A selenophosphate is a chemical compound containing phosphate anions substituted with selenium. Over 7000 compounds are known with a bond between selenium and phosphorus.

Key takeaways

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

Reference excerpt

A selenophosphate is a chemical compound containing phosphate anions substituted with selenium. Over 7000 compounds are known with a bond between selenium and phosphorus. Compared to phosphorus-sulfur compounds selenophosphates are less thermally stable, and more easily destroyed by water. However they are more stable than tellurophosphates which have an even weaker phosphorus-tellurium bond. Selenophosphates have an oxidation number for phosphorus of +5. But in many there are bonds between phosphorus atoms, reducing the oxidation state to +4, Some may be termed selenophosphites. Different structural anions include hexaselenohypodiphosphate [P2Se6]4− and [P6Se12]4− with decalin structure and [P4Se2]2− with dicyclobutane structure. Selenophosphates are coloured, often orange. They are semiconductors. The first selenodiphosphate was discovered in 1973 by H. Hahn. Selenophosphate compounds may have some or all of the selenium replaced by sulfur.

Formation Selenophosphates can be produced by melting phosphorus selenide with metal selenides.

Molecular biology Selenocysteine is produced in many organisms from a selenophosphate. In humans and other eucaryotes, this is facilitated by the enzyme selenophosphate synthetase 1. Selenium is connected to phosphorus using a reaction with selenide and adenosine triphosphate

List 235 entries

References

Extra reading Wang, Fengmei; Shifa, Tofik A.; Yu, Peng; He, Peng; Liu, Yang; Wang, Feng; Wang, Zhenxing; Zhan, Xueying; Lou, Xiaoding; Xia, Fan; He, Jun (September 2018). "New Frontiers on van der Waals Layered Metal Phosphorous Trichalcogenides". Advanced Functional Materials. 28 (37) 1802151. Bibcode:2018AdvFM..2802151W. doi:10.1002/adfm.201802151. hdl:10278/3742841. ISSN 1616-301X. S2CID 105564142. Samal, Rutuparna; Sanyal, Gopal; Chakraborty, Brahmananda; Rout, Chandra Sekhar (2021). "Two-dimensional transition metal phosphorous trichalcogenides (MPX 3 ): a review on emerging trends, current state and future perspectives". Journal of Materials Chemistry A. 9 (5): 2560–2591. doi:10.1039/D0TA09752G. ISSN 2050-7488. S2CID 233958469. Susner, Michael A.; Chyasnavichyus, Marius; McGuire, Michael A.; Ganesh, Panchapakesan; Maksymovych, Petro (October 2017). "Metal Thio- and Selenophosphates as Multifunctional van der Waals Layered Materials". Advanced Materials. 29 (38) 1602852. Bibcode:2017AdM....2902852S. doi:10.1002/adma.201602852. ISSN 0935-9648. OSTI 1842642. PMID 28833546. S2CID 31497995. Chen, Zi-Xia; Liu, Wenlong; Guo, Sheng-Ping (January 2023). "A review of structures and physical properties of rare earth chalcophosphates". Coordination Chemistry Reviews. 474 214870. doi:10.1016/j.ccr.2022.214870. S2CID 252869394. Li, Zhuang; Yao, Jiyong; Wu, Yicheng (4 November 2020). "Chalcophosphates: A Treasure House of Infrared Nonlinear Optical Materials". Crystal Growth & Design. 20 (11): 7550–7564. Bibcode:2020CrGrD..20.7550L. doi:10.1021/acs.cgd.0c01234. S2CID 226340520.

Worked examples

Example 1 — a first encounter with Selenophosphate

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

In research: Selenophosphate appears in 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 Selenophosphate 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: Selenophosphate is common in secondary-school and first-year university syllabi. It links to neighbouring topics Phosphates, Selenides, so understanding it makes those chapters shorter.
In everyday life: Look for Selenophosphate 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 Selenophosphate in 20 minutes

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

Frequently asked questions

What is Selenophosphate in simple terms?

A selenophosphate is a chemical compound containing phosphate anions substituted with selenium. Over 7000 compounds are known with a bond between selenium and phosphorus.

Why does Selenophosphate matter?

Because it connects several 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 Selenophosphate?

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 Selenophosphate.