Wooden Crystal Models - Tetragonal

Title

Wooden Crystal Models - Tetragonal

Subject

Geology, Mineralogy and Crystallography

Description

Physical Description

These crystal models are composed of light pearwood. Each model is precisely shaped with correct facets and angles to illustrate seven different groups of crystal structures: isometric, tetragonal, hexagonal, orthorhombic, monoclinic, triclinic/trigonal, and twins. Some have been carefully sanded to represent natural curvature of face edges. Each individual model is unique, the length varying from 3 to 7 centimeters and the width from 2 to 7 centimeters. Some have identification numbers carved into them, which pertain to their original kit number given by the manufacturer. Some have handwritten numbers in black ink on their flat faces, which identify the name of the crystal they represent.

Functional Description

These crystal models were made as a tool for teaching crystallography and the morphology of crystals. Each model has unique external symmetry that replicates the actual crystal, providing a hands-on teaching practice that is still used today in class rooms. This specific collection is still used to teach crystallography at Michigan Technological University.

Creator

Savannah de Luca

Date

c. 1910

Language

English

Type

Physical object

Identifier

none

Physical Dimensions

Length: average 5cm by 5cm

Materials

Pearwood

Maker

Dr. F. Kranz, Bonn, Germany

Inscriptions

Some have identification numbers cut into them pertaining to each kit they originally came from, some have writing in ink on the flat faces that identify the mineral they model.

Location

A.E. Seaman Mineral Museum

Files

Wooden Crystal Models Tetragonal (4).jpg
Wooden Crystal Models Tetragonal (1).jpg
Wooden Crystal Models Tetragonal (5).jpg

Citation

Savannah de Luca, “Wooden Crystal Models - Tetragonal,” Michigan Tech Inventory of Historic Scientific Instruments, accessed July 5, 2020, https://ihsi.omeka.net/items/show/105.

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