Structure and thermal expansion of sulfuric acid octahydrate
Synchrotron X‐ray powder diffraction has been used to structurally characterize crystallization products from 37.8 and 40.5 wt% aqueous sulfuric acid solutions. It is confirmed that, despite speculation in the literature, the structure that predominately crystallized from these solutions is sulfuric...
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| Veröffentlicht in: | Journal of applied crystallography 2012-12, Vol.45 (6), p.1198-1207 |
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| container_title | Journal of applied crystallography |
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| creator | Maynard-Casely, Helen E. Brand, Helen E. A. Wallwork, Kia S. |
| description | Synchrotron X‐ray powder diffraction has been used to structurally characterize crystallization products from 37.8 and 40.5 wt% aqueous sulfuric acid solutions. It is confirmed that, despite speculation in the literature, the structure that predominately crystallized from these solutions is sulfuric acid octahydrate (SAO). The existence of an uncharacterized phase is also noted. It was found that existing models proposed for the crystal structure of SAO did not satisfactorily fit to the data acquired here, and hence a new structure solution was sought. It is reported here that the structure of SAO is contained within a unit cell with I2 symmetry with a = 7.44247 (11), b = 7.4450 (1), c = 26.1168 (3) Å, β = 125.0428 (7)°, V = 1184.78 (3) Å3 at 80 K. Data were collected at temperatures between 80 and 198 K, which enabled determination of the thermal expansion of SAO. |
| doi_str_mv | 10.1107/S0021889812037752 |
| format | Article |
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A. ; Wallwork, Kia S.</creator><creatorcontrib>Maynard-Casely, Helen E. ; Brand, Helen E. A. ; Wallwork, Kia S.</creatorcontrib><description>Synchrotron X‐ray powder diffraction has been used to structurally characterize crystallization products from 37.8 and 40.5 wt% aqueous sulfuric acid solutions. It is confirmed that, despite speculation in the literature, the structure that predominately crystallized from these solutions is sulfuric acid octahydrate (SAO). The existence of an uncharacterized phase is also noted. It was found that existing models proposed for the crystal structure of SAO did not satisfactorily fit to the data acquired here, and hence a new structure solution was sought. It is reported here that the structure of SAO is contained within a unit cell with I2 symmetry with a = 7.44247 (11), b = 7.4450 (1), c = 26.1168 (3) Å, β = 125.0428 (7)°, V = 1184.78 (3) Å3 at 80 K. 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A.</creatorcontrib><creatorcontrib>Wallwork, Kia S.</creatorcontrib><title>Structure and thermal expansion of sulfuric acid octahydrate</title><title>Journal of applied crystallography</title><addtitle>J. Appl. Cryst</addtitle><description>Synchrotron X‐ray powder diffraction has been used to structurally characterize crystallization products from 37.8 and 40.5 wt% aqueous sulfuric acid solutions. It is confirmed that, despite speculation in the literature, the structure that predominately crystallized from these solutions is sulfuric acid octahydrate (SAO). The existence of an uncharacterized phase is also noted. It was found that existing models proposed for the crystal structure of SAO did not satisfactorily fit to the data acquired here, and hence a new structure solution was sought. It is reported here that the structure of SAO is contained within a unit cell with I2 symmetry with a = 7.44247 (11), b = 7.4450 (1), c = 26.1168 (3) Å, β = 125.0428 (7)°, V = 1184.78 (3) Å3 at 80 K. Data were collected at temperatures between 80 and 198 K, which enabled determination of the thermal expansion of SAO.</description><subject>atmospheres</subject><subject>Crystal structure</subject><subject>Crystallization</subject><subject>Diffraction</subject><subject>Europa</subject><subject>icy moons</subject><subject>Mathematical models</subject><subject>Sulfuric acid</subject><subject>sulfuric acid hydrate</subject><subject>synchrotron powder diffraction</subject><subject>Synchrotrons</subject><subject>Thermal energy</subject><subject>Thermal expansion</subject><subject>X-rays</subject><issn>1600-5767</issn><issn>0021-8898</issn><issn>1600-5767</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqFkE1LwzAYx4MoOKcfwFvBi5dqnqZJWvDipk5lKHsRwUtIk5R1du1MWty-vZGKiB48Pc_h93te_ggdAz4DwPx8hnEESZImEGHCOY12UA8YxiHljO_-6PfRgXNLjIHxKOqhi1ljW9W01gSy0kGzMHYly8Bs1rJyRV0FdR64tsxbW6hAqkIHtWrkYqutbMwh2stl6czRV-2jp5vr-fA2HD-O7oaX41CRlMQh9xdJmmNOdOoXc2liwIpkaaZiJQ0hSnJgMZBMQ0YYlVlkiKZKa5XkMmWkj067uWtbv7XGNWJVOGXKUlambp3wv0BMUwrg0ZNf6LJubeWvEwAsxZyRmHoKOkrZ2jlrcrG2xUrarQAsPvMUf_L0TtI570Vptv8L4n44vRpQwLFXw04tXGM236q0r4Jxwql4fhiJ-eRlMJ1AIjD5AOWUhhU</recordid><startdate>20121201</startdate><enddate>20121201</enddate><creator>Maynard-Casely, Helen E.</creator><creator>Brand, Helen E. A.</creator><creator>Wallwork, Kia S.</creator><general>International Union of Crystallography</general><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20121201</creationdate><title>Structure and thermal expansion of sulfuric acid octahydrate</title><author>Maynard-Casely, Helen E. ; Brand, Helen E. A. ; Wallwork, Kia S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3934-7037a5f073d90017ae410c3b9bc4cae33ca716413bd1b365ab2e3d5cddc8fa963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>atmospheres</topic><topic>Crystal structure</topic><topic>Crystallization</topic><topic>Diffraction</topic><topic>Europa</topic><topic>icy moons</topic><topic>Mathematical models</topic><topic>Sulfuric acid</topic><topic>sulfuric acid hydrate</topic><topic>synchrotron powder diffraction</topic><topic>Synchrotrons</topic><topic>Thermal energy</topic><topic>Thermal expansion</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Maynard-Casely, Helen E.</creatorcontrib><creatorcontrib>Brand, Helen E. A.</creatorcontrib><creatorcontrib>Wallwork, Kia S.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of applied crystallography</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Maynard-Casely, Helen E.</au><au>Brand, Helen E. A.</au><au>Wallwork, Kia S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structure and thermal expansion of sulfuric acid octahydrate</atitle><jtitle>Journal of applied crystallography</jtitle><addtitle>J. Appl. Cryst</addtitle><date>2012-12-01</date><risdate>2012</risdate><volume>45</volume><issue>6</issue><spage>1198</spage><epage>1207</epage><pages>1198-1207</pages><issn>1600-5767</issn><issn>0021-8898</issn><eissn>1600-5767</eissn><abstract>Synchrotron X‐ray powder diffraction has been used to structurally characterize crystallization products from 37.8 and 40.5 wt% aqueous sulfuric acid solutions. It is confirmed that, despite speculation in the literature, the structure that predominately crystallized from these solutions is sulfuric acid octahydrate (SAO). The existence of an uncharacterized phase is also noted. It was found that existing models proposed for the crystal structure of SAO did not satisfactorily fit to the data acquired here, and hence a new structure solution was sought. It is reported here that the structure of SAO is contained within a unit cell with I2 symmetry with a = 7.44247 (11), b = 7.4450 (1), c = 26.1168 (3) Å, β = 125.0428 (7)°, V = 1184.78 (3) Å3 at 80 K. Data were collected at temperatures between 80 and 198 K, which enabled determination of the thermal expansion of SAO.</abstract><cop>5 Abbey Square, Chester, Cheshire CH1 2HU, England</cop><pub>International Union of Crystallography</pub><doi>10.1107/S0021889812037752</doi><tpages>10</tpages></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete; Alma/SFX Local Collection |
| subjects | atmospheres Crystal structure Crystallization Diffraction Europa icy moons Mathematical models Sulfuric acid sulfuric acid hydrate synchrotron powder diffraction Synchrotrons Thermal energy Thermal expansion X-rays |
| title | Structure and thermal expansion of sulfuric acid octahydrate |
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