Matter
Name
Full extraterrestrial matter
Family
Family
extraterrestrial
Comments
Impurities (13.3% wt.%) in the fraction < 2µm: 5.2% Quartz, 0.1% Plagioclase, 0.4% Calcite, 0.2% Dolomite, 1.3% Kaolinite, 0.2% Chlorites, 4.4% Clinopyroxenes, 1.4% Orthopyroxenes (Vogt et al. 2002). INFRARED SPECTROSCOPY: Typical spectrum for Wyoming bentonite with a moderateFe+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
Parent matter
TEST solid matter
Level
from international repository
Origins
planetary
Provider
Source Clays Repository - The Clay Minerals Society, Purdue University, West Lafayette, IN, USA
Provider reference code
SWy-2
Local reference code
Smectite CMS SWy-2
IGSN code
2-112-23-42-0
Object name
Lunar soil TEST
Body name
Moon
Place
Station 8, at base of Sculptured Hills, south of Wessex Cleft. Taurus-Littrow Valley.

Coordinates

System
Moon 2000
Position type
point
Geolocation
Point Latitude Longitude Altitude
#1 80.0° 399.0° 999.0 m
Image
Pictures of the 6 grain size fractions of SWy-2 smectite particles taken under a binocular microscope at three different zoom levels (zoom level increases from left (5mm FS) to right (1mm FS))
très belle image !
Preparation
raw
Method
Wyoming bentonite. Collection in June 1993 from a stockpile of very recently mined clay. The American Colloid Company donated the sample
Storage condition
au sec
Phase type
solid
Component type (group)
chondritic matrix, extracted SOM
Comments
components comments
Grain type
single grain
Location in object
center of cluster
Shape
loose powder
Texture
loose coarse grained
Type of porosity
open pores
Porosity
-9.8e+01 $\pm$ 0.99
Density
99.0 $\pm$ 0.99 $g.cm^{-3}$
Texture
compact microporous
Grain compacity
0.35 $\pm$ 0.05
Grain density
1.22 $\pm$ 0.02 $g.cm^{-3}$
Grain sizes
Grains Size min Size max Size median Size width Equivalent diameter Size mass fraction Grain shape
#1 10.0 ${\mu}m$ 20.0 ${\mu}m$ 9.0 ${\mu}m$ 2.0 ${\mu}m$ 15.0 ${\mu}m$ 0.1 $\pm$ 0.01 acicular
#2 20.0 ${\mu}m$ 50.0 ${\mu}m$ 25.0 ${\mu}m$ 12.0 ${\mu}m$ 27.1442 ${\mu}m$ 0.2 $\pm$ 0.02 acicular
#3 50.0 ${\mu}m$ 150.0 ${\mu}m$ 60.0 ${\mu}m$ 35.0 ${\mu}m$ 72.1125 ${\mu}m$ 0.25 $\pm$ 0.025 acicular
Size distribution
Homogène
Size method
triée
Comments
weakly consolidated aggregates (of < 2µm particles) with complex shape often elongated and relatively far from spheroids
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
Global analysis of the SWy-1 clay collected earlier at the same location
Atom $H$ $^2H$ or $D$ H/C O/C N/C S/C
Mole fraction 0.95 0.05 1.5 2.5 3.5 4.5
Mass fraction 0.25 0.75
sp2/sp3 ratio
2.0
Gap Tauc
3.0
Gap E04
4.0 $eV$
Comments
composition coments
Number
2
Mode of mixing
homogeneous mixing
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
Full extraterrestrial matter material en vrac 399.0 1.0 $\pm$ 0.0001 abundance_comments
Full matter material en vrac 399.0 1.0 $\pm$ 1.0000000000000001e-07 200-280 µm size fraction - adsorption independent of particle size (agglomerate of < 2µm particles)
Title
compaction of the surface

Precursors

Matters
Materials

Produced matter

Matter
Full mineral matter
Materials
Processing steps
Step Date Type Process Changes
#1 2007-01-01 mechanical sample slightly packed with a tamper to obtain a smooth surface limited compaction of the surface
#2 2007-01-02 mechanical sample slightly packed with a tamper to obtain a smooth surface limited compaction of the surface
Comments
ambient temperature (293 K)- in air (1 bar)
Documentations
Links
Publications