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. 2019 Dec 5;24(4):333–342. doi: 10.1007/s10911-019-09441-3

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© The Author(s) 2019

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Fig. 1 — The structure of single repeating units (unit cells) of breast microcalcification phases. a a unit cell of hydroxyapatite (HAp), b a unit cell of octacalcium phosphate (OCP), c a unit cell of magnesium whitlockite. Arrows indicate the three directions of the lattice parameters ‘a’, ‘b’ and ‘c’