Vote for your favorite mineral in #MinCup25! - Calcite vs. Perovskite
This match of heavy hitters is bound to end in heartbreak as classic calcite faces off against futuristic perovskite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Tilleu, C. E. (1933) Portlandite, a new mineral from Scawt Hill, Co. Antrim. Mineralogical Magazine and Journal of the Mineralogical Society, 23 (142) 419-420 doi:10.1180/minmag.1933.023.142.04

Advanced
   -   Only viewable:
Reference TypeJournal (article/letter/editorial)
TitlePortlandite, a new mineral from Scawt Hill, Co. Antrim
JournalMineralogical Magazine and Journal of the Mineralogical Society
AuthorsTilleu, C. E.Author
Year1933 (September)Volume23
Issue142
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_23/23-142-419.pdf+
DOIdoi:10.1180/minmag.1933.023.142.04
Generate Citation Formats
Mindat Ref. ID7168Long-form Identifiermindat:1:5:7168:4
GUID0
Full ReferenceTilleu, C. E. (1933) Portlandite, a new mineral from Scawt Hill, Co. Antrim. Mineralogical Magazine and Journal of the Mineralogical Society, 23 (142) 419-420 doi:10.1180/minmag.1933.023.142.04
Plain TextTilleu, C. E. (1933) Portlandite, a new mineral from Scawt Hill, Co. Antrim. Mineralogical Magazine and Journal of the Mineralogical Society, 23 (142) 419-420 doi:10.1180/minmag.1933.023.142.04
In(1932) Mineralogical Magazine Vol. 23 (142) Mineralogical Society
Abstract/NotesThough calcium hydroxide has long been known as a product of hydrolysis of Portland cement, reliable data on its physical and optical properties were not available until Ashton and Wilson prepared this substance artificially and had examined crystals developed in rugs in old cement briquettes. In examining some recently collected larnite-spurrite-rocks from Scawt Hill the writer observed crystals now shown to be Ca(OH)2 as constituents of aggregates composed mainly of coarsely grained afwillite, forming infillings in these contact-rocks.

Map of Localities

Locality Pages

LocalityCitation Details
Scawt Hill, Larne, Co. Antrim, Northern Ireland, UK

Mineral Pages

MineralCitation Details
Portlandite

Mineral Occurrences

LocalityMineral(s)
Scawt Hill, Larne, Co. Antrim, Northern Ireland, UK Portlandite


See Also

These are possibly similar items as determined by title/reference text matching only.

 
and/or  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 4, 2025 20:42:59
Go to top of page