CAS 12168-80-8PubChem CID 3080680
Feldspar
Orthoclase is a mineral with formula of KAlSi3O8 or K(AlSi3O8). The corresponding IMA (International Mineralogical Association) number is IMA1962 s.p.. The IMA symbol is Or.
— RRUFF Project
- IUPAC name
- aluminum;potassium;octakis(oxygen(2-));tris(silicon(4+))
- Molecular formula
- AlKO8Si3
- Molecular weight
- 278.33 g/mol
- Exact mass
- 277.8353415 Da
- Topological polar surface area
- 8.0 Ų
- Hydrogen-bond donors
- 0
- Hydrogen-bond acceptors
- 8
- Covalent units
- 13
- Defined stereocentres
- 0
Also known as
Aluminate(1-), octaoxotrisilicate-, potassiumRefChem:55786934-437-1OrthoclaseOrthoclase (K(AlSi3O8))aluminum;potassium;oxygen(2-);silicon(4+)Potassium feldsparUNII-96874XSJ39
4 more reported names
ORTHOSEAluminum potassium silicon oxide (AlKSi3O8)GEMS'TONE LEPIDOLITEDLHONNLASJQAHX-UHFFFAOYSA-N
External database identifiers
Evidence from additional scientific databases
NIH PubChem PUG-View
Exact identifier match3080680
Attributed physical-property, hazard, environmental and use annotations.
Mapped by: Existing checksum-valid CAS to unique PubChem CID match.
Retrieved: 2026-08-31.
Open source record
Scientific classifications and hazard annotations provide context and do not replace the market-specific regulatory decision shown above.
Additional source coverage and match status
| Source | Result | Checked |
|---|
| NIH PubChem PUG-View | Exact match | 2026-08-31 |
|---|
A recorded no-match is useful evidence that the source was checked; it is not a claim that the substance does not exist elsewhere.
Retrieved from NIH PubChem on 2026-08-31 by checksum-valid CAS matching. Chemical properties do not replace the regulatory decision on this page.