Purpose

Universal Fedorov table is purposed to determine rock-forming minerals with universal optical method on polarization microscope.

The table is used for:

1. Determining composition of plagioclases by twin crystals with classic theodolite method of E.S.Fedorov and with double theodolite method of A.N.Zavaritski.
2. Determining composition of plagioclases by extinction angle in zone section + (010).
3. Determining of monoclinics, pyroxenes, omfibols.
4. Determining of potassium-sodium feldspars.

Usage of the Fedorov table allows to make following researches and operations:

1. Determining of a mineral anisotropy if you have its isotropy section.
2. Determining of a mineral axiality (to distinguish single-axis mineral from two-axis mineral in any section of the crystal).
3. Determining of the optical indicatrix symmetry axes (and its plane symmetry therefore) and optical axes relatively to a sample.
4. Determining of the optical sign of single-axis mineral in any section.
5. Determining of the optical sign and value of 2ν in two-axes minerals either by direct measurement (in section parallel to middle axis of the optical indicatrix Nn) or by Zavaritski method (in section perpendicular to Nn).
6. Determining of main section of the optical indicatrix to determine the mineral birefringence.
7. Determining of positions of faces, cleavage plane and edges relatively to the sample plane. 

Delivery set

1. The universal 5-axis stage
2. 3.7x0.11 objective
3. 5.5x0.16 objective
4. Top segment with N = 1.516
5. Top segment with N = 1.548
6. Top segment with N = 1.650
7. Bottom segment with N = 1.516
8. Bottom segment with N = 1.548
9. Bottom segment with N = 1.650
10. Retaining screw (2 pcs)
11. A pin
12. Objective holder (2 pcs)
13. Wrench (2 pcs)
14. Russian manual

Condition

Seems to be a new, unused. Many pieces are still in factory paper.

You can download a free English manual from the Manuals page.