| Name: | Portlandite Por |
| IMA Chemistry: | Ca(OH)2 |
| Chemistry Elements: | The mineral Portlandite contains elements: Calcium (Ca) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | United Kingdom |
| Year First Published: | 1933 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Tilley C E (1933) Portlandite, a new mineral from Scawt Hill, Co. Antrim, Mineralogical Magazine 23, 419-420 |
| Structural Group Name: | Brucite |
| Fleischer's Group Name: | brucite |
| Crystal Systems: | hexagonal |
| Oldest Known Age: | 2400 Million Years Ago |
| Mohs Hardness: | 2.0 |
| Diaphaneity: | 3.0 |
| Specific Gravity: | 2.23 |
| More Info: | Search Wikipedia: Portlandite (Wiki) Search Mindat: Portlandite Search Web Mineral DB: Portlandite |