SPICA: stereographic projection for interactive crystallographic analysis

Abstract

In numerous research fields, especially the applications of electron and X-ray diffraction, stereographic projection represents a powerful tool for researchers. SPICA is a new computer program for stereographic projection in interactive crystallographic analysis, which inherits features from the previous JECP/SP and includes more functions for extensive crystallographic analysis. SPICA provides fully interactive options for users to plot stereograms of crystal directions and crystal planes, traces, and Kikuchi maps for an arbitrary crystal structure; it can be used to explore the orientation relationships between two crystalline phases with a composite stereogram; it is also used to predict the tilt angles of transmission electron microscopy double-tilt and rotation holders in electron diffraction experiments. In addition, various modules are provided for essential crystallographic calculations.

Branching of Titanium Nanorods

“…That is, angles measured in three dimensions are projected to a plane that contains the nanorod and the incidence flux in Figure 2 d. In our results, the angles are those measured in three dimensions. The conversion from an angle measured in three dimensions to its projection on a particular plane is possible through a Stereographic projection chart [ 41 , 42 ]. For example, projection of angle γ is the same 71.4° ( Figure 2 d).…”

New Heusler compounds in Ni-Mn-In and Ni-Mn-Sn alloys

“…The EDS data were collected with the ChemiSTEM system on the Osiris microscope and analyzed with Bruker’s ESPRIT software. The tilt series of experimental SAED patterns were analyzed using SAED3 15 and SPICA 16 software. The experimental HRTEM images were processed by EMIPA software 17 .…”

Landyne 4 - A Software Suite for Electron Diffraction Simulation and Analysis

“…A function is added on recently for the precise determination of crystal orientation using an electron diffraction pattern with three Kikuchi pairs [5]. SPICA 3 [6] is for stereographic projection with an application for specimen orientation adjustment using TEM holders. SPICA inherits JECP/SP functions and expands many new functions, e.g.…”