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| Kalinite | |
|---|---|
 Kalinite from the Virgin Valley District, Nevada, USA. Specimen size 5.4 cm | |
| General | |
| Category | Sulfate Mineral |
| Formula (repeating unit) | KAl(SO4)2.11H2O |
| Strunz classification | 6/C.13-20 or 7.CC.15 |
| Dana classification | 29.5.4.2 |
| Crystal system | Monoclinic 2/m prismatic |
| Identification | |
| Formula mass | 456.37 g |
| Color | White to pale blue |
| Crystal habit | Fibrous |
| Fracture | Conchoidal |
| Mohs scale hardness | 2 to 2.5 |
| Luster | Vitreous |
| Streak | White |
| Diaphaneity | Transparent |
| Specific gravity | 1.75 (observed) 2.0 (calculated) |
| Optical properties | Biaxial (-), 2V = 52° (measured), 82° (calculated) |
| Refractive index | nα = 1.429 to 1.430, nβ = 1.452, nγ = 1.456 to 1.458 |
| Birefringence | None |
| Solubility | Soluble in water |
| Other characteristics | Not fluorescent, barely detectable radioactivity |
| References | [1][2][3][4] |
Kalinite is a fibrous monoclinic type of alum distinct from isometric potassium alum[5], named in 1868 for its potassium content. Kalium is the Latin name for potassium (hence its chemical symbol, "K").
A proposal to discredit kalinite as a mineral species has been submitted to the International Mineralogical Association[4], but it is currently (March 2010) on the list of approved minerals[6]. Many older samples, however, have been found to be potassium alum[2].
Environment edit
Kalinite is a rare secondary mineral observed in the oxidized zone of mineral deposits, as efflorescence on alum slates, in caves, and as a volcanic sublimate[7]. It is associated with jarosite, KFe3+3(SO4)2(OH)6, and cuprian melanterite (pisanite), (Fe2+,Cu2+)SO4·7H2O, at Quetena, Chile[8].
Unit Cell edit
Space Group: C2/c
Unit Cell Parameters[1]: a=19.92 Å, b=9.27 Å, c=8.304 Å, β = 98.79°, Z=4
References edit
- ^ a b Gaines et al (1997) Dana’s New Mineralogy, Wiley
- ^ a b http://www.handbookofmineralogy.org/pdfs/kalinite.pdf
- ^ http://www.webmineral.com/data/Kalinite.shtml
- ^ a b http://www.mindat.org/min-2137.html
- ^ American Mineralogist (1923) 8:15
- ^ http://rruff.info/ima
- ^ American Mineralogist (1927) 12:14
- ^ American Mineralogist (1938) 23:721