• Amara, Mongi Ben
• Murshed, Mohammad Mangir
• Hamed, Teycir Ben
• Gesing, Thorsten M.
• Nénert, Gwilherm

Abstract

<jats:title>Abstract</jats:title><jats:p>We have investigated the crystal structure of the synthetic analogue of the mineral iwateite using powder diffraction and Raman spectroscopy. Na<jats:sub>2</jats:sub>BaMn(PO<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub> crystallizes in the space group <jats:italic>P</jats:italic><jats:inline-formula id="zkri-2020-0028_ineq_001_w2aab3b7c57b1b6b1aab1c15b1b8Aa"><jats:alternatives><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:mover><m:mo>3</m:mo><m:mo>‾</m:mo></m:mover></m:math><jats:tex-math>$&amp;#x203e;{3}$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/j_zkri-2020-0028_ineq_001.png" /></jats:alternatives></jats:inline-formula><jats:italic>m</jats:italic>1 (No. 164) with cell parameters <jats:italic>a</jats:italic> = 5.37292(1) Å, and <jats:italic>c</jats:italic> = 7.09538(1) Å (<jats:italic>R</jats:italic><jats:sub>wp</jats:sub> = 5.7%, <jats:italic>V</jats:italic> = 177.38 Å<jats:sup>3</jats:sup>, <jats:italic>Z</jats:italic> = 1). The space group assignment is supported by the experimentally observed 11 Raman active modes which agree with the expected number of modes for the <jats:italic>P</jats:italic><jats:inline-formula id="zkri-2020-0028_ineq_002_w2aab3b7c57b1b6b1aab1c15b1c25Aa"><jats:alternatives><m:math xmlns:m="http://www.w3.org/1998/Math/MathML" overflow="scroll"><m:mover><m:mo>3</m:mo><m:mo>‾</m:mo></m:mover></m:math><jats:tex-math>$&amp;#x203e;{3}$</jats:tex-math><jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/j_zkri-2020-0028_ineq_002.png" /></jats:alternatives></jats:inline-formula><jats:italic>m</jats:italic>1 symmetry.</jats:p>

Topics

• impedance spectroscopy
• mineral
• Raman spectroscopy
• space group