Wollastonit (Ca(SiO3))

Bezeichnung:Wollastonit (Ca(SiO3))

CAS-Nr13983-17-0

Englisch Name:Calcium metasilicate

CBNumberCB6189806

SummenformelCaO3Si

Molgewicht116.16

MOL-Datei13983-17-0.mol

Synonyma

Wollastonit (Ca(SiO3))

Wollastonit (Ca(SiO3)) physikalisch-chemischer Eigenschaften

Schmelzpunkt	1540°C
Dichte	2,9 g/cm³
Brechungsindex	1.62-1.64
Stabilität	Stable.
IARC	3 (Vol. Sup 7, 68) 1997
EPA chemische Informationen	Wollastonite (13983-17-0)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37
S-Sätze:	22-37/39-26
TSCA	Yes
Giftige Stoffe Daten	13983-17-0(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Calcium metasilicate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37:Reizt die Augen und die Atmungsorgane.
S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Beschreibung
“Wollastonite” occurs as a calcium inosilicate mineral that may contain small amounts of Fe, Mg and Mn substituting for calcium.
The manufactured salt is usually white. It forms within the earth when impure limestone is subjected to high temperature and pressure, sometimes in the presence of silica-bearing fluids as in metamorphic rocks. It is named after the English chemist and mineralogist William Wollaston (1766– 1828).
Wollastonite crystallizes as a triclinic crystal with the space group, 1, and the lattice constants: a = 7.94? , b = 7.32 ? , c = 7.07 ? ; α= 90.03°, β = 95.37°, γ = 103.43° and six formula units per cell.
Chemische Eigenschaften
White to brown, red, gray, yellow solid; vitreous to pearly luster. Mohs hardness 4.5–5.
Physikalische Eigenschaften
Wollastonite occurs as bladed crystal masses, single crystals can show an acicular particle shape and usually it exhibits a white color, but sometimes cream, gray or very pale green. The melting point of wollastonite is about 1540°C.
Verwenden
Ceramics; paint extender; welding rod coatings; rubber filler; silica gels; paper coating; filler in plastics, cements, and wallboard; mineral wool; soil conditioner.
Verwenden
Wollastonite is used primarily in ceramics, friction products (brakes and clutches), metalmaking, paint filler, and plastics.
Definition
A natural calcium silicate found in metamorphic rocks.
Vorbereitung Methode
Wollastonite is a natural calcium silicate that typically occurs in deposits with other silicate minerals. When crushed, it tends to cleave into particles that have length to diameter ratios of 7 or 8 to 1. Fibrous forms of wollastonite are not uncommon.
Allgemeine Beschreibung
White or slightly cream-colored powder. pH (aqueous slurry) 8.0 to 10.0.
Air & Water Reaktionen
Insoluble in water.
Reaktivität anzeigen
These substances undergo chemical reactions only under relatively severe circumstances or in the presence of an effective catalyst that promotes reaction. They are resistant to ignition, although they may become flammable at very high temperatures. They will be resistant to oxidation/reduction, except in the most severe conditions. These materials may be nontoxic.
Hazard
Questionable carcinogen
Brandgefahr
Flash point data for CALCIUM SILICATE are not available; however, CALCIUM SILICATE is probably nonflammable.

Calcium metasilicate Upstream-Materialien And Downstream Produkte

Wollastonit (Ca(SiO3)) Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

13983-17-0, Calcium metasilicate Verwandte Suche:

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