DIAMOND WINDOWS, CYLINDERS, PISTONS & ATR’S

Introduction:

Our diamond windows are used in new diamond anvil cells, devised for the single-crystal structure analyses under high pressure. Our large single-crystal diamond plates are used for the windows and fixed on the table planes of diamond anvils. Almax diamond plate windows have great advantages for single-crystal diffractometry:


Great progress of the structure analyses could be made by the combination with synchrotron radiation (SR). These advantages could measure the intensities of much higher order reflections and the precise electron density distribution as a function of pressure.



Choose type:


Choose aperture:

X ranges from:
1.50 up to 4.50 mm

Choose selections (type Ia diamond):


- Low birefringence

All diamonds to be used for anvil manufacture are examined under a polarising microscope for birefringence. Diamonds with significant birefringence discontinuity, typical of inclusions, etc. are rejected. In addition diamonds can be selected for ultralow birefringence. Total birefringence is measured using crossed polarisers, a waveplate and matched to specifications. Normally:

1. Low birefringence <0.0001
2. Ultra low birefringence <0.00005

- Low fluorescence

Almax Industries can select its diamonds for low fluorescence. Standard measurements include laser excitation at 532 nm and covers fluorescence background in the range of 542 to 608 nm (Raman shifts between 1000 and 3000 cm-1). Measurements for different wavelength ranges can be made available on request. In special cases customers can select their own diamonds for low fluorescence using their own measurement set-up. Almax classifies its diamonds with respect to fluorescence according to the following criteria:

1. UV low fluorescence (click here for a typical spectrum):
Just checked by a UV lamp.
2. Raman low fluorescence (click here for a typical spectrum):
The intensity of the background fluorescence of diamond at 1000 cm-1 relative to the intensity of the single phonon Raman transition at 1332 cm-1 is less than 0.5%.
The intensity of the two-phonon Raman transition at 2664 cm-1 is at least 1.25 times the intensity of the background fluorescence of diamond.
3. Raman ultra low fluorescence (click here for a typical spectrum):
The intensity of the two-phonon Raman transition at 2664 cm-1 is at least 2 times the intensity of the background fluorescence of diamond.