Rääf
 Tekst üüb Öömrang |
Rääf, uk baarnstian (lat. electrum of glaesum, ualgreks ἤλεκτρον ēlektron) as en mineraal. Det grünjlaag as harts faan näädelbuumer, woorskiinelk sjüüren, det witj am oober ei so nau.
| Rääf | |
 | |
| Ööder nöömer |
|
| Cheemisk formel | C10H16O+(H2S) |
| Mineraalklas | nian (efter IMA) 50.00.00.00 efter Dana |
| Kristalsüsteem | amorph |
| Kristalklas; efter Hermann-Mauguin | amorph |
| Klöör | hönanggüül, güülwitj, orangj, ruad, greenelk, brün, suart |
| Stregklöör | witj |
| Hardhaid | 2 bit 2,5 |
| Sachthaid (g/cm3) | 1,05 bit 1,096 |
| Glans | fäätag, mat |
| Transparens | trochsichtag, trochskemern of ei trochsichtag |
| Bröök | üs kaamken, rewag |
| Splitjboorkaid | naan |
| Kristalfurem | ünreegelmiatag, trinj, knolag, buarkag, dialwis mä iinslööden insekten of plaanten |
| Kristaloptik | |
| Breegtaal | n = 1,540 (−0,001 bit +0,005) |
| Dobelbreegen | naan |
| Muar eegenskapen | |
| Cheemisk ferhualen | reagiaret mä sürstoof, süren, alkaalis an ööle, stabiil jin ether, aceton an swaawelsüren |
| Eenelk mineraalen | nianen |
| Aparte kääntiaken | braant, huuch elektrisk wederstant (1018 Ωmm2/m), woort bi't rofin elektrostaatisk apleesen. |
Luke uk diar
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