Alphabetical Index
Chemical Composition

Keyword Search
Named Inclusions
Steel Index

Exogenous Inclusions
Indigenous Inclusions

Macro Inclusions
Micro Inclusions
Nano Inclusions

Iron Oxide Inclusions
Nitride Inclusions
Oxide Inclusions
Phosphide Inclusions
Silicate Inclusions
Spinel Inclusions
Sulfide Inclusions

Refractory Inclusions
Slag Inclusions

Figure Browser

Help
Contact Us
Home

Cristobalite in manganese-silicate


Figure 1: Cristobalite in manganese-silicate, Mag. 400 X, scale bar: 50 µm.

Inclusion name: Cristobalite
Record No.: 9
Inclusion formula: SiO2
Inclusion type (Macro/Micro/Nano): Macro
Inclusion type (Exogenous/Indigenous): Indigenous
Inclusion classification: Oxide
Inclusion composition in weight %: Ct-Cristobalite with 100% SiO2, trace of MnO, M-Matrix with 51% MnO, 3% FeO, traces of Ti, Al and P, partly glassy, partly crystallized rhodonite. Mean analysis (calc.) 34% MnO, 64% Sio2, 2% FeO.
Sample: Basic electric steel, Si-killed, inclusion isolated from the lower central part of a top cast 6 ton ingot.
Steel composition in weight %: 0.16% C, 0.35% Si, 0.67% Mn, 0.015% P, 0.017% S, 0.009% N, 100 ppm O, Al has not been found.
Note: The well developed cristobalite dendrites and their vey low Al2O3 content are an indication of an indigenous origin for this type of inclusion particle.
Reference: Not shown in this demo version.