Matter
- Name
- Na-montmorillonite (inf. 0.1 mm)
- Family
- mineral
- Comments
- Impurities: quartz, feldspar, mica and/or illite, calcite, hematite, kaolinite(?) and/or chlorite(?) (Chipera & Bish 2001). Impurities (13.3% wt.%) in the fraction <2µm of SWy-2: 5.2% Quartz, 0.1% Plagioclase, 0.4% Calcite, 0.2% Dolomite, 1.3% Kaolinite, 0.2% Chlorite, 4.4% Clinopyroxene, 1.4% Orthopyroxene (Vogt et al. 2002). INFRARED SPECTROSCOPY: Typical spectrum for Wyoming bentonite with a moderate Fe+3 content (band at 885 cm-1). Quartz is detectable (band at 780, 800,698, 400, and 373 cm-1), a trace of carbonate (band at 1425 cm-1).
- Database
- Experimentalists
- Level
- local matter
- Origins
- natural terrestrial
- Provider
- Source Clays Repository - The Clay Minerals Society, Purdue University, West Lafayette, IN, USA
- Local reference code
- SWy-3
- Body name
- Earth
- Terrain type
- mineral surface
- Place
- Newcastle formation (cretaceous), Crook County , Wyoming , United States
Coordinates
- Comments
- According to the Clay Minerals Society, SWy-3 is the same as SWy-1 and SWy-2. SWy-2 and SWy-3 were collected from the same mine from where SWy-1 was collected at two later occasions).
- Preparation
- sieved fraction
- Phase type
- solid
- Component type (group)
- mineral (silicate mineral), mineral (non-silicate mineral)
- Type of porosity
- porous
- Grain sizes
-
Grains Size min Size max Size median Size width Size mass fraction Grain shape #1 0.1 $mm$ 1.0 None
- Oxides
-
Formula $SiO_{2}$ $Na_{2}O$ $CaO$ $K_{2}O$ $Al_{2}O_{3}$ $Fe_{2}O_{3}$ $FeO$ $MnO$ $MgO$ $TiO_{2}$ $P_{2}O_{5}$ $CO_{2}$ $F$ $S$ Mass fraction (%) 62.9 1.53 1.68 0.53 19.6 3.35 0.32 0.006 3.05 0.09 0.049 1.33 0.111 0.05 - Oxides comments
- Loss on heating: -550°C: 1.59%, 550-1000°C: 4.47%.
- Number
- 10
- Mode of mixing
- homogeneous mixing
- Materials