Topic
Karlite
About: Karlite is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 14 citations. The topic is also known as: IMA1980-030.
Papers
TL;DR: Several different metamorphic events on marbles from the Schlegeistal (Western Tauern Area, Tyrol, Austria) have resulted in a great variety of mineral assemblages as discussed by the authors.
Abstract: Several different metamorphic events — an early or prevariscian regional, a variscian contact and the alpine regional — on marbles from the Schlegeistal (Western Tauern Area, Tyrol, Austria) have resulted in a great variety of mineral assemblages. These assemblages include calcite, dolomite, tremolite, diopside, forsterite, clinohumite-titanianclinohumite-chondrodite, chlorite-serpentine, brucite, and boron minerals karlite and ludwigite.
12 citations
1 Jan 2007
TL;DR: Karlite, a borate mineral with the idealized formula Mgr(BOr)r(OH,Cl), occurs in a clinohumite-chlorite marble associated with ludwigite at Schlegeistal, Zillertaler Alpen, Austria.
Abstract: Karlite, a new borate mineral with the idealized formula Mgr(BOr)r(OH,Cl), occurs in a clinohumite-chlorite marble associated with ludwigite at Schlegeistal, Zillertaler Alpen, Austria The mineral is white to light green and has a silky luster It occurs as aggregates of minute needles and prisms elongated parallel to c, as much as l0 mm long, which sometimes have rosette-like forms Karlite is biaxial negative with a mean 2v of 24o, a: 1589, F: 1632, y = 1634, y d: 0045, X: c, Y : b,Z: a; and is colorless in thin section The (001) cleavage is perfect The two most common forms are {ll0} and {100} Hardness is 55 Streak is colorless Karlite is orthorhombic, Y2r2,2r, with a: 17929(5), b: 17600(5), c: 3102(l)A, Z:4, G*" : 302, G-* : 280 to 285 The six strongest lines of the X-ray pattern (4 in A, intensity, hkl) are 221,100,810,740,441; 283,92,620;225,87,251; 27g,92,260,221,540; 1253,76,11o; and289,68, 160,221,121 IR spectra indicate that water is present as (oH) only DTA shows only one strong nonreversible endotherm at 830"C Melting occurs at 1345"C Combined microprobe, thermogravimetric and wet chemical analysis yielded SiO2 002, TiO2 < 001, B2O3 2292, A12O3296, Ct2O, < 001, FeO 227, MnO 017, MgO 5890, CaO 014, KrO 001, NarO 001, F 016, Cl 326,H2O* 1040, HrO063 (not included in total), total 10122, O = F 082, corr total 10040 The mineral is named in honor of Prof Dr Franz Karl late professor of mineralogy and petrography at the Christian Albrechts University, Kiel, West Germany; in recognition of his geologic studies of the Eastern Alps
Journal Article•
TL;DR: Karlite as discussed by the authors is a borate mineral with the idealized formula Mgr(BOr)r(OH,Cl), which occurs in a clinohumite-chlorite marble associated with ludwigite at Schlegeistal, Zillertaler Alpen, Austria.
Abstract: Karlite, a new borate mineral with the idealized formula Mgr(BOr)r(OH,Cl), occurs in a clinohumite-chlorite marble associated with ludwigite at Schlegeistal, Zillertaler Alpen, Austria. The mineral is white to light green and has a silky luster. It occurs as aggregates of minute needles and prisms elongated parallel to c, as much as l0 mm long, which sometimes have rosette-like forms. Karlite is biaxial negative with a mean 2v of 24o, a: 1.589, F: 1.632, y = 1.634, y - d: 0.045, X: c, Y : b,Z: a; and is colorless in thin section. The (001) cleavage is perfect. The two most common forms are {ll0} and {100}. Hardness is 5.5. Streak is colorless.
Performance Metrics
| Year | Papers |
|---|---|
| 2007 | 1 |
| 1981 | 1 |
| 1980 | 1 |