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![[Figure 3]](gj5306fig3mag.jpg)
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Figure 3
[001] projection of the twinned aragonite morphology. (a) Penetration (i), (ii), (iii) and contact (iv), (v), (vi) {110} twins of aragonite. Angles φ = 63.824°, χ = 58.088°, ω = 52.352° [redrawn from Otálora et al. (2018  )]. (b) Our elaboration of (a): parent (P and 1) and both twinned individuals (T and 2, 3) along with the m ≡ 〈110〉 twin planes; the indexes of the faces and the angles (α, β) they form are also indicated. Note: all the twin planes are parallel to the {110} faces; and individuals 1 and 2, along with 1 and 3, are twinned, whereas 2 and 3 are not twinned with each other, and hence there is no contact between their {110} faces (individuals 2 and 3). |
![[Figure 3]](gj5306fig3.jpg)
 | JOURNAL OF APPLIED CRYSTALLOGRAPHY |
ISSN: 1600-5767
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