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Edenite or edenitic hornblende is a double chain silicate mineral of the amphibole group with the general chemical composition NaCa2Mg5(Si7Al)O22(OH)2. Edenite is named for the locality of Edenville, Orange County, New York, where it was first described.
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mineral group crystal properties amphibole chemical naca2mg5 si7al o22 oh habit optical references monoclinic rocks first pleochroism system class space
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Edenite | 2V angle | 50–82° | 1.00 | infobox |
| Edenite | Birefringence | δ = 0.025 | 1.00 | infobox |
| Edenite | Category | Amphibole mineral | 1.00 | infobox |
| Edenite | Cleavage | Good on (110) | 1.00 | infobox |
| Edenite | Color | White to gray, pale to dark green, also brown and pale pinkish-brown | 1.00 | infobox |
| Edenite | Crystal class | Prismatic (2/m) (same H-M symbol) | 1.00 | infobox |
| Edenite | Crystal habit | Prismatic crystals, fibrous, as reaction rims on pyroxenes | 1.00 | infobox |
| Edenite | Crystal system | Monoclinic | 1.00 | infobox |
| Edenite | Diaphaneity | Semitransparent | 1.00 | infobox |
| Edenite | Formula | NaCa2Mg5(Si7Al)O22(OH)2 | 1.00 | infobox |
| Edenite | Formula mass | 834.25 g/mol | 1.00 | infobox |
| Edenite | Fracture | Conchoidal | 1.00 | infobox |
| Edenite | IMA symbol | Ed | 1.00 | infobox |
| Edenite | Luster | Vitreous | 1.00 | infobox |
| Edenite | Mohs scale hardness | 5–6 | 1.00 | infobox |
| Edenite | Optical properties | Biaxial (+) | 1.00 | infobox |
| Edenite | Pleochroism | Distinct, greens, blue-greens, and yellow-browns | 1.00 | infobox |
| Edenite | Refractive index | nα = 1.606 – 1.649, nβ = 1.617 – 1.660, nγ = 1.631 – 1.672 | 1.00 | infobox |
| Edenite | Space group | C2/m | 1.00 | infobox |
| Edenite | Specific gravity | 3.05–3.37 | 1.00 | infobox |
| Edenite | Streak | White | 1.00 | infobox |
| Edenite | Strunz classification | 9.DE.15 | 1.00 | infobox |
| Edenite | Tenacity | Brittle | 1.00 | infobox |
| Edenite | Twinning | Simple or multiple parallel to {010} | 1.00 | infobox |
| Edenite | Unit cell | a = 9.83, b = 17.95 c = 5.3 [Å], β = 105.18°; Z = 2 | 1.00 | infobox |
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