TY - JOUR
T1 - A new biogenic, struvite-related phosphate, the ammonium-analog of hazenite, (NH4)NaMg2(PO4)2·14H2O Yang Hexiong [email protected]
AU - Yang, Hexiong
AU - Martinelli, Livia
AU - Tasso, Flavia
AU - Sprocati, Anna Rosa
AU - Pinzari, Flavia
AU - Liu, Zhenxian
AU - Downs, Robert T.
AU - Sun, Henry J.
N1 - Publisher Copyright:
© 2014 by Walter de Gruyter Berlin/Boston.
PY - 2014/8/1
Y1 - 2014/8/1
N2 - A new biogenic, struvite-related phosphate, the ammonium analog of hazenite (AAH), ideally (NH4) NaMg2(PO4)2·14H2O, has been found in cultures containing the bacterial strain Virgibacillus sp.NOT1 (GenBank Accession Number: JX417495.1) isolated from an XVII Century document made of parchment. The chemical composition of AAH, determined from the combination of electron microprobe and X-ray structural analyses, is [(NH4)0.78K0.22]NaMg2(PO4)2·14H2O. Single-crystal X-ray diffraction shows that AAH is orthorhombic with space group Pmnb and unit-cell parameters a = 6.9661(6), b = 25.236(3), c = 11.292(1) Å, and V = 1985.0(3) Å3. Compared with hazenite, the substitution of NH4+for K+results in a noticeable increase of the average A-O (A = NH4++K+) bond length and the unit-cell volume for AAH, as also observed for struvite vs. struvite-K. Both infrared and Raman spectra of AAH resemble those of hazenite, as well as struvite. Our study reveals that AAH forms only in cultures with Na-bearing solutions and pH below 10.0. No AAH or hazenite was found in experiments with the K-bearing solutions, suggesting the necessity of a Na-bearing solution for AAH formation.
AB - A new biogenic, struvite-related phosphate, the ammonium analog of hazenite (AAH), ideally (NH4) NaMg2(PO4)2·14H2O, has been found in cultures containing the bacterial strain Virgibacillus sp.NOT1 (GenBank Accession Number: JX417495.1) isolated from an XVII Century document made of parchment. The chemical composition of AAH, determined from the combination of electron microprobe and X-ray structural analyses, is [(NH4)0.78K0.22]NaMg2(PO4)2·14H2O. Single-crystal X-ray diffraction shows that AAH is orthorhombic with space group Pmnb and unit-cell parameters a = 6.9661(6), b = 25.236(3), c = 11.292(1) Å, and V = 1985.0(3) Å3. Compared with hazenite, the substitution of NH4+for K+results in a noticeable increase of the average A-O (A = NH4++K+) bond length and the unit-cell volume for AAH, as also observed for struvite vs. struvite-K. Both infrared and Raman spectra of AAH resemble those of hazenite, as well as struvite. Our study reveals that AAH forms only in cultures with Na-bearing solutions and pH below 10.0. No AAH or hazenite was found in experiments with the K-bearing solutions, suggesting the necessity of a Na-bearing solution for AAH formation.
KW - Ammonium phosphate
KW - X-ray diffraction
KW - biomineral
KW - crystal structure
KW - hazenite
KW - infrared and Raman spectra
KW - struvite-type materials
UR - http://www.scopus.com/inward/record.url?scp=84906995076&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84906995076&partnerID=8YFLogxK
U2 - 10.2138/am.2014.4768
DO - 10.2138/am.2014.4768
M3 - Article
AN - SCOPUS:84906995076
SN - 0003-004X
VL - 99
SP - 1761
EP - 1766
JO - American Mineralogist
JF - American Mineralogist
IS - 8-9
ER -