|
The
International
Union
of
Crystallography
maintains
this
clearinghouse
of
educational
resources.
There
are
many
topics
incorporated
into
this
site,
including
applied
crystallography,
crystal
growth,
crystal
structure
analysis,
crystals
and
their
structures,
diffraction,
distance
teaching,
mathematical
techniques,
on-line
courses,
powder
diffraction,
and
symmetry.
This
site
would
be
useful
for
anyone
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
|
||||
|
This
site
consists
of
a
compilation
of
crystallographic
and
physical
property
data
for
most
of
the
rock-forming
minerals.
Thirteen
mineral
groups
are
included:
single
oxides,
multiple
oxides,
hydroxides,
sulfates,
phosphates,
orthosilicates
(neosilicates),
sorosilicates
and
cyclosilicates,
chain
silicates
(inosilicates),
sheet
silicates
(phyllosilicates),
framework
silicates
(tektosilicates),
high
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
|
||||
|
This site consists of an introductory lecture on crystal symmetry and symmetry operations. It provides the definition of a mineral and then covers topics including different types of rotational symmetry, mirror symmetry, the center of symmetry, different types of rotoinversion, and combinations of symmetry operations. Drawings help illustrate the concepts presented in the lecture.
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
|
||||
|
This site provides a detailed look at the crystal structure and compositional variations of amphiboles. Also discussed are ways to assess the quality of analyses from looking at the stoichiometry of mineral formulas, how to estimate ferric iron, and special considerations affecting formula recalculation. A 3-D model of the mineral's structure is also included.
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is part of :
This resource is included in the following collections:
|
||||
|
This
site
examines
the
crystal
chemistry
of
some
common
mineral
groups,
including
garnet,
plagioclase,
pyroxene,
mica
(muscovite
and
biotite),
and
amphibole.
For
each
group,
the
topics
considered
include:
the
sites
in
the
crystal
structure
on
which
the
principal
substitutions
take
place,
the
typical
ranges
of
observed
composition
variation,
how
to
assess
the
quality
of
analyses
from
looking
at
the
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
|
||||
|
This
site
is
a
lecture
by
Dr.
Stephen
Nelson
from
Tulane
University
that
explores
the
32
possible
combinations
of
symmetry
operations
that
define
the
external
symmetry
of
crystals.
The
lecture
defines
the
six
crystal
systems
(triclinic,
monoclinic,
orthorhombic,
tetragonal,
hexagonal,
and
isometric)
and
explains
the
derivation
of
the
Hermann-Mauguin
symbols
(also
called
the
international
symbols)
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
|
||||
|
This site is a lecture from Tulane University that explores the symmetry observed in crystals. Topics covered include crystallographic axes, the crystal lattice, and unit cells. Tables and illustrations accompany the text.
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is part of :
This resource is included in the following collections:
|
||||
|
This
site
provides
an
illustrated
lecture
from
a
geochemistry
course
offered
by
Dr.
Scott
Wood
at
the
University
of
Idaho.
Topics
include
crystal
chemistry,
ionic
substitutions
in
crystals,
weathering
(dissolution,
redox
reactions,
acid
hydrolysis,
and
kinetics),
the
solid
products
of
weathering,
and
the
chemistry
of
continental
waters.
The
lecture
presentation
may
be
downloaded
as
a
PDF
document
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is part of :
This resource is included in the following collections:
|
||||
|
This
resource
provides
illustrated
lecture
notes
from
a
geochemistry
course
offered
by
Dr.
Scott
Wood
at
the
University
of
Idaho.
Topics
include
the
law
of
radioactivity
and
the
general
geochronometry
equation,
the
use
common
radioactive
decay
equations
such
as
K-Ar,
Ar-Ar,
Rb-Sr,
and
U-Th-Pb,
the
use
of
isochrones,
concordia
diagrams
and
discordia,
the
concept
of
"blocking
temperature,"
the
use
of
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is part of :
This resource is included in the following collections:
|
||||
|
This
site
provides
an
illustrated
lecture
about
ocean
chemistry
from
a
geochemistry
course
offered
by
Dr.
Scott
Wood
at
the
University
of
Idaho.
Topics
include
geochemical
processes
that
occur
in
estuaries,
halmyrolysis,
the
concept
of
residence
time
for
elements
in
the
ocean,
the
mechanisms
by
which
elements
are
added
to
or
removed
from
seawater,
carbonate
behavior
in
seawater
and
a
definition
of
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is part of :
This resource is included in the following collections:
|
||||
