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. 2019 Jan 28;9:810. doi: 10.1038/s41598-018-37123-3

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Surface microstructures and phase analyses of nHA and mHA powders. (a1,a1’,b1,b1’) SEM images of (a1,a1’) nHA and (b1,b1’) mHA powders. The original magnification was 10,000x for (a1,b1) and 20,000x for (a1’,b1’). Scale bar = 5μm for (a1,b1) and Scale bar = 3μm for (a1’,b1’). (c) XRD spectra of nHA and mHA powders. Phases were identified based on nHA (ICSD pattern 00-001-1008) and mHA (ICSD pattern 01-073-8419).