Celsian


Also found in: Wikipedia.

celsian

[′sel·sē‚an]
(mineralogy)
BaAl2Si2O8 Colorless, monoclinic mineral consisting of barium feldspar.

Celsian

 

a mineral; a barium feldspar, with the composition Ba[Al2Si2O8]. The mineral is named in honor of the Swedish scientist A. Celsius. Celsian contains admixtures of K, Ca, and Sr. It crystallizes in the monoclinic system. Its structure, ordering, and conditions of formation are the same as those of other potassium-sodium feldspars. Celsian, which is colorless, has a density of 3,300–3,400 kg/m3 and a hardness of 6–6.5 on Mohs’ scale. A rare mineral, it is usually found in contact metasomatic deposits enriched by manganese rocks. In the USSR it is found in the Ukraine. There are also deposits in Sweden, Japan, and other countries.

Mentioned in ?
References in periodicals archive ?
Molly Cliff, a year nine student at Hipperholme and Lightcliffe High School, won a writing prize in a competition organised by Celsian Education.
The ninth Senior Citizens' Christmas Party was attended by more than 170 guests and supported by a range of local organisations, including Alcoa, BJ Bingo, Max Spielmann Celsian Education, Midland's Ambassador Century Woodall certificate.
Richard brings experience from the education recruitment sector, having worked previously for Hays and Celsian Education.
Celsian Education is one of the largest supply teacher agencies in the North East, providing over 300 supply teachers to North East schools every week.
SPECIALIST education recruiter Celsian, which has an office in Coventry, has designed a unique programme to support newly qualified teachers (NQTs) during their first year of supply teaching.
Our managed human resource services business continues to develop and our Celsian business acquired a small healthcare staffing business based in Manchester which complements our existing education and care businesses in that region.
SPECIALIST recruitment firm Celsian opens new offices in Liverpool's India Buildings, Water Street, today.
Celsian has consequently become a MetaSwitch Interoperability Partner.
The Celsian Momentum G-800 Series LAN Extension models are Symmetrical Digital Subscriber Line bridges and routers that are configured for LAN extension applications.
In 1996, Celsian Education was one of the earliest agencies to start recruiting teachers and supply staff, placing them in schools across the North East as First Call Educational Services.
CareerStart, run by the company Celsian, includes seminars on education and the law, classroom management and professional development.
THE Department of Education and Skills (DfES) has awarded the new Quality Mark for teacher supply agencies to Celsian.