Matter
Name
Na-exchanged beidellite SbId-1 size-fraction <0.1 µm
Family
mineral
Parent matter
Low charge beidellite SbId-1
Origins
natural terrestrial
Provider
CML laboratory
Local reference code
NaSbId1_LSD
Preparation
extracted components
Method
Monominerallic sample extracted by removal of carbonates, organics, and Fe-(oxy-)hydroxides by a sequence of acetic acetate buffer, hydrogen peroxide, and buffered sodium dithionite treatments, followed by washing in deionized water, size separation by centrifugation, ionic exchange by five washings with 0.5 M NaCl and subsequent dialysis in deionized water and drying at 60C. Sample was stored at room temperature and relative humidity
Phase type
solid
Component type (group)
mineral (silicate mineral)
Texture
aggregated grains
Type of porosity
particulate
Texture
clay-like
Grain sizes
Grains Size min Size max Size median Size width Size mass fraction Grain shape
#1 0.1 ${\mu}m$ 1.0 $\pm$ 0.05 platy
Size method
size-fraction was separated in a centrifuge (Stoke's Law) but not verified
Number
1
Mode of mixing
single material
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
Na-exchanged beidellite SbId-1 size-fraction <0.1 µm 1.0 $\pm$ 0.01
Title
Purification, size separation, and cation exchange

Precursors

Matters
Materials

Produced matter

Matter
Na-exchanged beidellite SbId-1 size-fraction <0.1 µm (this matter)
Processing steps
Step Date Type Process Changes
#8 2013-03-15 thermal Drying in an oven at 60C Drying of a sample
#1 2013-03-06 mechanical Dry sieving at 400µm mesh Removal of coarse fraction (above 0.4 mm
#2 2013-03-06 chemical Reaction of 30 g of a sample with 150 ml of hydrogen peroxide for 30 min at 40C. Repeated 3 times. Removal of organic matter
#3 2013-03-07 chemical Reaction with 200 ml of Na-acetate buffer (ph 4.5 to 5.5) at 90C for 30 min Removal of carbonates
#4 2013-03-08 chemical Reaction with 2g sodium dithionite in 200 ml of sodium citrate - sodium bicarbonate solution at 75C Removal of free Fe(hydro)oxides
#5 2013-03-09 fluid physical Washing with deionized water Removal of excess adsorbed cations and anions
#6 2013-03-10 mechanical centrifugagion in deionized water Separation of <0.1 micron fraction according to Stoke's Law
#7 2013-03-11 fluid physical Dialysis in deionized water. Water was changed until conductivity of water dropped below 1 microsiemens Removal of excess adsorbed cations and anions
#9 2013-03-17 mechanical Crushing in an agate mortar Disintegration of a sample in order to create powder