gypsum
mineral, calcium sulfate with bounded water
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Summary
gypsum is a mineral species[1]. gypsum ranks in the top 0.28% of mineral species entities by monthly Wikipedia readership (11,254 views/month, #4 of 1,431).[2]
Key Facts
- Chemical formula: CaSO₄·2H₂O[3]
- Subclass of: gypsum mineral group[4], sulfate mineral[5], calcium sulfate dihydrate[6], material[7]
- Part of: bofutsushosan[8], white-tiger and ginseng decoction[9], chotosan[10], eppikajutsuto[11], gokoto[12], makyokansekito[13], mokuboito[14], shin'iseihaito[15], shofusan[16], shosaikotokakikyosekko[17]
- Commons category: Gypsum[18]
- Streak color: white[19]
- Crystal system: monoclinic crystal system[20]
- IMA status and/or rank: grandfathered mineral (G)[21]
- Strunz 8th edition (series ID, updated): VI/C.16[22]
- Nickel-Strunz 9th edition (updated 2009): 7.CD.40[23]
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 7.CD.40[24]
- Topic's main category: Category:Gypsum[25]
- Commons gallery: Gypsum[26]
- Mohs' hardness: 2[27]
- Described by source: Otto's encyclopedia[28], Explanatory Dictionary of the Living Great Russian Language, Second Edition[29], Small Brockhaus and Efron Encyclopedic Dictionary[30], Brockhaus and Efron Encyclopedic Dictionary[31], Russian translation of Lübker's Antiquity Lexicon[32], Slovník naučný[33], Encyclopædia Britannica 11th edition[34], The American Cyclopædia[35], The New Student's Reference Work[36], Pauly–Wissowa[37]
- Has effect: gypsum exposure[38]
- Different from: plaster[39], gesso[40]
- NIOSH Pocket Guide ID: 0308[41]
- Density: 2.32[42]
- Mass: 172.2[43]
- Melting point: 325[44], 262[45]
- Vapor pressure: 0[46]
- Solubility: 0.2[47]
- Time-weighted average exposure limit: 5[48], 10[49], 15[50]
- Associated hazard: gypsum exposure[51]
Why It Matters
gypsum has Wikipedia articles in 30 language editions, a strong signal of global cultural recognition.[52] gypsum is known by 87 alternative names across languages and contexts.[53]