Fluoro-edenite
NaCa2Mg5(Si7Al)O22F2IMA symbol: Fledredefined
Fluoro-edenite is a silicate mineral with the formula NaCa2Mg5(Si7Al)O22F2, crystallizing in the monoclinic system. It has a Mohs hardness of 5.5. Its streak is yellow.
Photos
Crystallography
| Crystal system | monoclinic crystal systemWikidata (CC0) |
|---|---|
| Space group | C 1 2/m 1 |
| Cell (Å, °) | a = 9.871, b = 18.033, c = 5.2805; α = 90, β = 104.97, γ = 90 |
| Cell volume | 908.048 ų, Z = 2 |
| Source structure | COD 9017646 (Mineralogical Magazine, 2014) — 1 of 13 structures |
Physical properties
| Hardness (Mohs) | 5.5single sourceWikidata (CC0) |
|---|---|
| Streak | yellowsingle sourceWikidata (CC0) |
Chemistry (calculated)
| Molecular weight | 838.23 g/molcalculated from the IMA formula |
|---|---|
| Composition (wt%) | Na 2.74%, Ca 9.56%, Mg 14.5%, Si 23.45%, Al 3.22%, O 41.99%, F 4.53% |
Classification
| Nickel-Strunz (10th) | 9.DE.15Wikidata (CC0) |
|---|---|
| Nickel-Strunz (9th) | 9.DE.10Wikidata (CC0) |