Influence of Activity of CaSO<sub>4</sub><i>·</i>2H<sub>2</sub>O on Hydrothermal Formation of CaSO<sub>4</sub><i>·</i>0.5H<sub>2</sub>O Whiskers

<table>Variation of [Ca<sup>2+</sup>] (a) and <svg height="19.924999" id="M19" style="vertical-align:-3.27605pt" version="1.1" viewbox="0 0 52.262501 19.924999" width="52.262501" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g transform="matrix(.017,-0,0,-.017,.062,15.775)"><path d="M290 -163h-170v866h170v-28q-79 -7 -94 -19.5t-15 -72.5v-627q0 -59 14.5 -71.5t94.5 -19.5v-28z" id="x5B"></path></g><g transform="matrix(.017,-0,0,-.017,5.927,15.775)"><path d="M409 504l-29 -5q-16 60 -44.5 96t-86.5 36q-54 0 -82.5 -32t-28.5 -77q0 -51 30.5 -82.5t96.5 -65.5l35.5 -18t33 -19.5t33.5 -23.5l27 -25.5t24.5 -32t13.5 -36.5t6 -45q0 -80 -62 -134.5t-160 -54.5q-47 0 -98 15q-22 7 -50 21q-8 23 -27 155l30 7q7 -27 18 -52
t30 -51.5t49 -42.5t67 -16q56 0 88 32.5t32 87.5q0 51 -31.5 82t-98.5 67q-80 44 -110 73q-55 53 -55 124q0 75 56 126.5t150 51.5q53 0 126 -23z" id="x53"></path></g><g transform="matrix(.017,-0,0,-.017,13.984,15.775)"><path d="M381 665q131 0 226.5 -93t95.5 -239q0 -158 -96 -253t-238 -95q-137 0 -231 95t-94 238q0 142 92.5 244.5t244.5 102.5zM359 629q-89 0 -151 -74.5t-62 -208.5q0 -141 69 -233t175 -92q90 0 150.5 74t60.5 211q0 152 -69 237.5t-173 85.5z" id="x4F"></path></g>
<g transform="matrix(.012,-0,0,-.012,26.688,19.863)"><path d="M456 178h-96v-72q0 -51 12.5 -62.5t72.5 -16.5v-27h-256v27q65 5 78 17t13 62v72h-260v28q182 271 300 426h40v-407h96v-47zM280 225v295h-2q-107 -148 -196 -295h198z" id="x34"></path></g><g transform="matrix(.012,-0,0,-.012,33.012,7.612)"><path d="M412 140l28 -9q0 -2 -35 -131h-373v23q112 112 161 170q59 70 92 127t33 115q0 63 -31 98t-86 35q-75 0 -137 -93l-22 20l57 81q55 59 135 59q69 0 118.5 -46.5t49.5 -122.5q0 -62 -29.5 -114t-102.5 -130l-141 -149h186q42 0 58.5 10.5t38.5 56.5z" id="x32"></path></g><g transform="matrix(.012,-0,0,-.012,38.724,7.612)"><path d="M535 230h-483v50h483v-50z" id="x2212"></path></g>
<g transform="matrix(.017,-0,0,-.017,46.338,15.775)"><path d="M226 -163h-170v27q79 7 94 20t15 73v627q0 59 -15 72t-94 20v27h170v-866z" id="x5D"></path></g>
</svg> (b) with hydrothermal reaction time. Precursor: 1: commercial CaSO<sub>4</sub>·2H<sub>2</sub>O, 2: active CaSO<sub>4</sub>·2H<sub>2</sub>O. </table>

Journal of Nanomaterials

fig4

Figure 4

Figure 4: Influence of Activity of CaSO<sub>4</sub><i>·</i>2H<sub>2</sub>O on Hydrothermal Formation of CaSO<sub>4</sub><i>·</i>0.5H<sub>2</sub>O Whiskers 

Journal of Nanomaterials

Influence of Activity of CaSO4·2H2O on Hydrothermal Formation of CaSO4·0.5H2O Whiskers

Figure 4

Influence of Activity of CaSO₄·2H₂O on Hydrothermal Formation of CaSO₄·0.5H₂O Whiskers