|
This
site,
maintained
by
Caltech,
is
a
tutorial
on
the
basic
principles
of
phase
equilibria.
Topics
covered
include
the
first
and
second
laws
of
thermodynamics,
equilibrium,
Gibbs
free
energy,
chemical
potential,
the
graphical
representation
of
equilibrium
conditions,
the
phase
rule,
and
univariant
and
invariant
assemblages.
Also
included
are
several
applets
that
show
the
results
of
changes
in
pressure,
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
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 is a table of crystallography groups. The table is composed of 32 classes of symmetry derived from observations of the external crystal form. From these 32 classes, 230 space groups are distinguishable using x-ray analysis. The site also features 3-D rotating examples of crystalline forms for each symmetry class. The illustrations are helpful for visualizing crystal forms.
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is included in the following collections:
|
||||
|
This
site
consists
of
the
lecture
notes
for
an
advanced
mineralogy
course
at
the
University
of
Colorado
taught
by
J.
R.
Smyth.
The
topics
covered
include
symmetry,
point
groups,
space
groups,
diffraction
and
structures,
mineral
spectroscopy,
and
descriptions
of
orthosilicates,
sorosilicates,
cyclosilicates,
chain
silicates,
and
layer
silicates.
Figures,
photographs
and
tables
are
included
with
the
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
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:
|
||||
|
MELTS
is
a
software
package
for
modeling
crystallization
of
magmatic
systems.
The
MELTS
home
page
provides
acess
to
three
types
of
modeling
tools.
The
software
can
be
used
to
calculate
phase
equilibria
or
to
compute
thermodynamic
properties
of
mineral
solid
solutions.
For
most
applications
the
user
enters
mineral
composition,
temperature
and
pressure.
The
web
site
features
demo
software,
downloadable
...
|
|
|
|
|
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
an
interface
to
a
crystal
structure
database
that
includes
every
structure
published
in
the
American
Mineralogist,
the
Canadian
Mineralogist,
and
the
European
Journal
of
Mineralogy.
The
database
is
maintained
under
the
care
of
the
Mineralogical
Society
of
America
and
the
Mineralogical
Association
of
Canada,
and
financed
by
the
National
Science
Foundation.
The
site
is
searchable
by
mineral,
...
|
|
|
|
|
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
discusses
the
various
nonstandard
forms
of
crystal
growth
that
are
characteristic
to
some
minerals.
Topics
include
twinning
(contact
and
penetration,
polysynthetic
and
cyclical),
the
origins
of
twinning,
and
twin
laws
in
the
triclinic,
monoclinic,
orthorhombic,
tetragonal,
hexagonal,
and
isometric
systems.
Various
types
of
polymorphism
...
|
|
|
|
|
Choosing & Using this resource...
Related resources and collections
This resource is part of :
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:
|
||||
