" An ordinary chondrite from
the LL
group that is either petrologic type
6 or type 7."
The highlighted words are defined as follows:
Ordinary chondrite: A major class
of chondrites, distinguished by sub-solar Mg/Si and refractory/Si ratios, oxygen
isotope compositions that plot above the terrestrial fractionation line, and
a large volume percentage of chondrules, with only 10-15 vol% fine-grained matrix.
LL group:
The low-iron, low metal (LL) chemical group of ordinary
chondrites, distinguished by their low siderophile element
content, fairly large chondrules (~0.9 mm), and oxygen
isotope compositions that are further above the terrestrial
fractionation line than those of other ordinary chondrites.
Type 6:
Designates chondrites that have been metamorphosed under
conditions sufficient to homogenize all mineral compositions,
convert all low-Ca pyroxene to orthopyroxene, coarsen
secondary phases such as feldspar to sizes ≥50 µm,
and obliterate many chondrule outlines; no melting has
occurred.
Type 7:
Designates chondrites which have been metamorphosed to
nearly the point of melting. Minerals are equilibrated
and chondrules are indistinct or absent. This term is
not used consistently or widely accepted in the literature.
Slices
available,
only 11 thin slices (1.5mm thickness) between
1.80g to 4.51g and two endcuts weighing
6.69g
and 34.99g.
The
price is US
$15.00 per
gram.
Pour convertir le prix en Euros, cliquez sur le lien ci-dessous :
This
is 1 of 5 approved meteorites classified as LL6/7.
Here
are the 4 other records with exactly the same type:
See
more items: 
