About Portlandite
Calcium hydroxide, found naturally in some metamorphosed limestones or as a product of cement hydration. It's a grounding stone associated with stability.
Primary Hues
Colorless, White, often forms small hexagonal plates or massive
Geological & Scientific Details
Portlandite is classified as a oxide mineral mineral which typically crystallizes in the trigonal system. Its chemical formula is Ca(OH)2. Common crystal habits include hexagonal plates; commonly fibrous, powdery, massive..
Key Geological Properties:
- Mineral Category: Oxide mineral
- Chemical Formula: Ca(OH)2
- IMA Symbol: Por[1]
- Crystal System: Trigonal
- Predominant Geological Color: Colorless, white to greenish white
- Crystal Habit: Hexagonal plates; commonly fibrous, powdery, massive.
- Cleavage: Perfect on {0001}
- Luster: Pearly on cleavages
- Diaphaneity: Transparent
Associated Minerals
- Calcite
- Ettringite
- Afwillite
- Jennite