Zinc silicate
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Description
A naturally occurring mineral that may be white, yellow, red, green, or brown depending on impurities. Hydrated zinc silicate ore, Hemimorphite, was directly mixed with copper for making brass. Zinc silicate ore is often found mixed with smithsonite (Zinc carbonate) resulting in the early name of Calamine being applied to both ores. Anhydrous zinc silicate ore is called Willemite. Zinc silicate is phosphorescent and is used in television screens.
Synonyms and Related Terms
zinc orthosilicate; willemite; calamine; hemimorphite; silicate de zinc (Fr.); Zinksilikat (Deut.)
Physical and Chemical Properties
Insoluble in water or dilute acids
| Composition | Zn2SiO4 |
|---|---|
| CAS | 13598-65-4 |
| Mohs Hardness | 4.5 |
| Melting Point | 1509 C |
| Density | 4.103 g/ml |
| Molecular Weight | mol. wt. = 222.85 |
Resources and Citations
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- Susan E. Schur, Conservation Terminology: A review of Past & Current Nomenclature of Materials, Technology and Conservation, Spring (p.34-39); Summer (p.35-38); Fall (p.25-36), 1985
- The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 9964