1. Main Phase: Wurtzite Boron/ Nitride (w-BN)

Peak Positions : The most intense peaks of the experimental curve (red line) perfectly match the green reference markers for standard reference card 49-1327 for w-BN from the ICDD / JCPDS (International Centre for Diffraction Data) .

Key Reflections :

1. The dominant doublet (two closely spaced peaks) in the 2θ ≈ 41°–43° region corresponds to the primary crystallographic planes of the wurtzite lattice.
2. Distinct, well-defined peaks are also visible at 2θ ≈ 46.5° , 60.5° , and 74.5° .

Structural Features : The w-BN peaks exhibit significant broadening. This indicates extreme synthesis conditions (such as shock-wave or dynamic compression), which typically introduce a high density of stacking faults and small crystallite sizes (nanocrystallinity). 
This shock-wave-induced microstructure acts as a natural barrier to crack propagation. It provides the extreme fracture toughness needed for high-speed machining of hardened steels and superalloys.  
Read also about Wurtzite boron nitride crystal structure in comparison with crystal structures of Cubic boron nitride and Hexagonal boron nitride

Figure 1: XRD Phase Identification and Purity Analysis of Superhard Wurtzite Boron Nitride (w-BN).

2. Impurity Phase: Boron Carbide (B10C)

Peak Positions : Represented by the black reference markers (44-1206).

Profile Analysis : Theoretical reflections for B10C should appear in the lower angle region at 2θ ≈ 23.5° , 35° , and 37.8° . However, the experimental signal intensity at these positions remains virtually at the background noise level.

Conclusion : The concentration of the B10C phase in this sample is extremely low (at the detection limit of conventional XRD, likely under 1–2 wt.%), or it exists in a highly dispersed, amorphous state.

3. Impurity Phase: Hexagonal Boron Nitride (h-BN)

Peak Positions : Represented by the blue reference markers (34-0421).

Profile Analysis : The primary marker peak for the hexagonal phase (002) is expected at 2θ ≈ 26.7° (blue line). The experimental curve shows only a very faint, broad hump above the background in this area.

Conclusion : The phase transformation from the initial graphite-like phase (h-BN) to the superhard wurtzite modification (w-BN) is nearly complete. Residual h-BN content is negligible.

Summary

The experimental X-ray diffraction profile (red curve) confirms a dominant w-BN crystalline matrix matching ICDD reference card 49-1327, characterized by prominent peak broadening and high-intensity reflections. Vertical reference markers indicate near-complete conversion from the graphitic hexagonal boron nitride precursor (h-BN, 34-0421) and exceptional chemical purity with negligible trace boron carbide impurities (B10C, 44-1206) locked at the background noise level.

The Commercial Benefit: Exceptional chemical inertness up to high thermal thresholds of our wurtzite boron nitride powder ensures that your end product remains stable against chemical wear, oxidation, and reactive alloys. Do not compromise your production line with unverified, lower-grade boroni nitride powders.  

---