Crystal Properties

Giant Vibrating Crystal 

[M | t | ★★★]
Styrofoam spheres linked by springs in a 3×3×3 cubic lattice.

[In-Depth Description]

Atomic and Molecular Crystal Models

[M | t |—] 
Wooden, plastic, and Styrofoam models for show-n-tell.


[M | t | —]
Truncate an icosahedron to produce a Buckminister Fullerene...this is accompanied by a soccer ball and a C60 model.

OHP Kinetic Theory Model

[M | t+ | ★★★]
Simulation of molecular motion (Brownian, diffusion, etc.) with ball bearings on shaking table.

[In-Depth Description]

Crystal Growth & Recession

[S | t++ | ★★] 
Observation of ice crystal growth under microscope; growth/recession controlled by dry ice boundary.

[In-Depth Description]

Crystal Growth in Castings

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A hot casting is cooled rapidly to show the progression of crystal growth.

Dilatancy of Deformation 

[S | t++ | ★★]
Balloon filled with sand and ink; any compression results in increase in volume due to deformation of close packing. 

[In-Depth Description]

Cleaving of Sodium Chloride

[S | t | —] 
Cleave down crystal boundaries of rock salt.

Periodic Potential

[M | t | ★★]
Balls in a frame simulating the repeating potential wells of a lattice.

[In-Depth Description]

Laue Optical Analog

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2-Dim interfernce pattern as optical analog of x-ray diffraction; spinning the grating simulates polycrystaline ring patterns.

Liquid Crystal Sheets 

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Liquid crystal sheets, OHP display, and calculator or watch, among others, are available for show-n-tell.

[In-Depth Description]

Molecular Size

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Molecular size is determined by means of a Langmuir trough.

[In-Depth description]

Glass Transition

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Caramelized sugar assumes glasslike characteristics when rapidly cooled.

Supersaturation and Crystallization 

[S | t++ | ★★] 
Supersaturated solution of sodium acetate in beaker; crystallization triggered by seeding. 

[In-Depth Description]

Change of Volume with State

[M | t+ | ★★]
CO2 and He balloons in liquid nitrogen.

[In-Depth Description]


[M | t+ | ★★★]
The microcystaline structure of a steel wire changes from body-centered-cubic to face-centered-cubic as it is heated to red-hot.

[In-Depth Description]

Sublimation of CO2

[M | t | —]
Solid dry ice turns directly into gaseous state.

Solid, Liquid, Gaseous CO2

[S | t+ | —]
Observation of phase changes with corresponding pressure changes.

[In-depth description]

PVT Surfaces

[M | t | —]
Three-dimensional plaster model of PVT relationships.

[In-Depth Description]

Contact Us

Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
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