Kassite from the Diamond Jo quarry, Magnet Cove, Hot Spring County, Arkansas: The problem of cafetite and kassite
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Abstract
Small (<0.5 mm), brownish-pink platy rosettes and yellow spherules, in cavities in nepheline syenite at the Diamond Jo quarry, Magnet Cove, Hot Spring County, Arkansas, have been identified as kassite, CaTi2O4(OH)2, a mineral previously known only from the Kola Peninsula, USSR. The Magnet Cove kassite is orthorhombic, in space group Ammm, A2mm, A222, or A2,22, with unit-cell parameters a = 12.10, b = 31.65, c = 4.95 Å, and Z = 16; dcalc = 3.28 g/cm3. Principal X-ray powder lines [d in Å, (I)] are 7.85(10), 3.26(7), 2.565(7), 1.910(8), 1.898(6). The X-ray powder and single-crystal data and density correspond to those reported by earlier workers for cafetite, (Ca,Mg)(Fe,Al)2Ti4O12·4H2O, from Kola, but the chemical and physical properties correspond to those given in their description of kassite. These earlier workers may have intermixed samples during their X-ray study of kassite and cafetite.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Kassite from the Diamond Jo quarry, Magnet Cove, Hot Spring County, Arkansas: The problem of cafetite and kassite |
| Series title | American Mineralogist |
| Volume | 71 |
| Issue | 7-8 |
| Year Published | 1986 |
| Language | English |
| Publisher | GeoScienceWorld |
| Description | 4 p. |
| First page | 1045 |
| Last page | 1048 |
| Country | United States |
| State | Arkansas |
| County | Hot Spring County |
| Other Geospatial | Diamond Jo quarry, Magnet Cove |
| Google Analytic Metrics | Metrics page |