Ardaite
Pb17Sb15S35Cl9 [CNMNC approved formula]
Named for the Arda River, Bulgaria, which runs through the Madjarovo deposit.
| IMA status : | Approved Species 1980 (IMA1979-073) |
| CLASSIFICATION | |
| Dana (8th edition) : |
02.15.01.01 |
| (02) Sulfides - Including Selenides and Tellurides | |
| (02.15) (Chlorides) | |
| (02.15.01) | |
| Nickel-Strunz (10th edition) : |
02.LB.20 |
| (02) Sulfides | |
| (02.L) Unclassified Sulfosalts | |
| (02.LB) With essential Pb | |
| Crystal system: | Monoclinic System |
| Point group (H-M): | Unknown — Unk |
| Unit cell: | a = 22.09Å, b = 21.11Å, c = 8.05Å β = 103° |
| Crystal Habit: | Microscopic aggregates of acicular crystals |
| Color: | In reflected light greenish grey or bluish green |
| Diaphaneity: | Opaque |
| Luster: | Metallic |
| Hardness (Mohs): | 2.5 - 3 |
| Measured Density: | 6.17 g/cm3 |
| Geologic Setting: | Very rare in polymetallic ore deposits. |
| Mineral Association: | Galena, nadorite, chlorian robinsonite, chlorian semseyite, pyrostilpnite, argentian tetrahedrite, anglesite (Madjarovo, Bulgaria); sphalerite, pyrrhotite, chalcopyrite, magnetite, scheelite, stannite, pyrargyrite, silver, antimony, arsenopyrite, nisbite, graphite (Gruvasen, Sweden) |
| Synonyms/varieties: | IMA1979-073 |