Item talk:Q233135
From geokb
{
"USGS Publications Warehouse": { "@context": "https://schema.org", "@type": "Article", "additionalType": "Journal Article", "name": "Fluorite solubility equilibria in selected geothermal waters", "identifier": [ { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse IndexID", "value": "70010852", "url": "https://pubs.usgs.gov/publication/70010852" }, { "@type": "PropertyValue", "propertyID": "USGS Publications Warehouse Internal ID", "value": 70010852 }, { "@type": "PropertyValue", "propertyID": "DOI", "value": "10.1016/0016-7037(77)90224-1", "url": "https://doi.org/10.1016/0016-7037(77)90224-1" }, { "@type": "PropertyValue", "propertyID": "ISSN", "value": "00167037" } ], "journal": { "@type": "Periodical", "name": "Geochimica et Cosmochimica Acta", "volumeNumber": "41", "issueNumber": "2" }, "inLanguage": "en", "isPartOf": [ { "@type": "CreativeWorkSeries", "name": "Geochimica et Cosmochimica Acta" } ], "datePublished": "1977", "dateModified": "2024-03-08", "abstract": "Calculation of chemical equilibria in 351 hot springs and surface waters from selected geothermal areas in the western United States indicate that the solubility of the mineral fluorite, CaF2, provides an equilibrium control on dissolved fluoride activity. Waters that are undersaturated have undergone dilution by non-thermal waters as shown by decreased conductivity and temperature values, and only 2% of the samples are supersaturated by more than the expected error. Calculations also demonstrate that simultaneous chemical equilibria between the thermal waters and calcite as well as fluorite minerals exist under a variety of conditions.Testing for fluorite solubility required a critical review of the thermodynamic data for fluorite. By applying multiple regression of a mathematical model to selected published data we have obtained revised estimates of the pK\u00a0(10,96),\u00a0\u0394Gof\u00a0(\u2212280.08 kcal/mole),\u00a0\u0394Hof\u00a0(\u2212292.59 kcal/mole), S\u00b0 (16.39 cal/deg/mole) and\u00a0CoP\u00a0(16.16 cal/deg/mole) for CaF2\u00a0at 25\u00b0C and 1 atm. Association constants and reaction enthalpies for fluoride complexes with boron, calcium and iron are included in this review. The excellent agreement between the computer-based activity products and the revised pK\u00a0suggests that the chemistry of geothermal waters may also be a guide to evaluating mineral solubility data where major discrepancies are evident.", "description": "14 p.", "publisher": { "@type": "Organization", "name": "Elsevier" }, "author": [ { "@type": "Person", "name": "Jenne, E. A.", "givenName": "E. A.", "familyName": "Jenne" }, { "@type": "Person", "name": "Nordstrom, D. Kirk dkn@usgs.gov", "givenName": "D. Kirk", "familyName": "Nordstrom", "email": "dkn@usgs.gov", "identifier": { "@type": "PropertyValue", "propertyID": "ORCID", "value": "0000-0003-3283-5136", "url": "https://orcid.org/0000-0003-3283-5136" }, "affiliation": [ { "@type": "Organization", "name": "National Research Program - Central Branch", "url": "https://www.usgs.gov/centers/arizona-water-science-center" }, { "@type": "Organization", "name": "WMA - Earth System Processes Division", "url": "https://www.usgs.gov/mission-areas/water-resources" } ] } ] }, "OpenAlex": { "abstract_inverted_index": { "Calculation": [ 0 ], "of": [ 1, 24, 58, 91, 101, 111, 124, 182 ], "chemical": [ 2, 74 ], "equilibria": [ 3, 75 ], "in": [ 4, 15, 163 ], "351": [ 5 ], "hot": [ 6 ], "springs": [ 7 ], "and": [ 8, 52, 55, 80, 137, 145, 150, 159, 174 ], "surface": [ 9 ], "waters": [ 10, 46, 79, 184 ], "from": [ 11 ], "selected": [ 12, 116 ], "geothermal": [ 13, 183 ], "areas": [ 14 ], "the": [ 16, 22, 25, 59, 66, 77, 102, 125, 170, 175, 180 ], "western": [ 17 ], "United": [ 18 ], "States": [ 19 ], "indicate": [ 20 ], "that": [ 21, 38, 72, 179 ], "solubility": [ 23, 96, 193 ], "mineral": [ 26, 192 ], "fluorite,": [ 27 ], "CaF2,": [ 28 ], "provides": [ 29 ], "an": [ 30 ], "equilibrium": [ 31 ], "control": [ 32 ], "on": [ 33 ], "dissolved": [ 34 ], "fluoride": [ 35, 154 ], "activity.": [ 36 ], "Waters": [ 37 ], "are": [ 39, 61, 161, 198 ], "undersaturated": [ 40 ], "have": [ 41, 120 ], "undergone": [ 42 ], "dilution": [ 43 ], "by": [ 44, 49, 63 ], "non-thermal": [ 45 ], "as": [ 47, 82, 84 ], "shown": [ 48 ], "decreased": [ 50 ], "conductivity": [ 51 ], "temperature": [ 53 ], "values,": [ 54 ], "only": [ 56 ], "2%": [ 57 ], "samples": [ 60 ], "supersaturated": [ 62 ], "more": [ 64 ], "than": [ 65 ], "expected": [ 67 ], "error.": [ 68 ], "Calculations": [ 69 ], "also": [ 70, 186 ], "demonstrate": [ 71 ], "simultaneous": [ 73 ], "between": [ 76, 169 ], "thermal": [ 78 ], "calcite": [ 81 ], "well": [ 83 ], "fluorite": [ 85, 95 ], "minerals": [ 86 ], "exist": [ 87 ], "under": [ 88 ], "a": [ 89, 98, 112, 188 ], "variety": [ 90 ], "conditions.": [ 92 ], "Testing": [ 93 ], "for": [ 94, 105, 141, 153 ], "required": [ 97 ], "critical": [ 99 ], "review": [ 100 ], "thermodynamic": [ 103 ], "data": [ 104, 118, 194 ], "fluorite.": [ 106 ], "By": [ 107 ], "applying": [ 108 ], "multiple": [ 109 ], "regression": [ 110 ], "mathematical": [ 113 ], "model": [ 114 ], "to": [ 115, 190 ], "published": [ 117 ], "we": [ 119 ], "obtained": [ 121 ], "revised": [ 122, 176 ], "estimates": [ 123 ], "pK": [ 126, 177 ], "(10,96),": [ 127 ], "\u0394Gof": [ 128 ], "(\u2212280.08": [ 129 ], "kcal/mole),": [ 130, 133 ], "\u0394Hof": [ 131 ], "(\u2212292.59": [ 132 ], "S\u00b0": [ 134 ], "(16.39": [ 135 ], "cal/deg/mole)": [ 136, 140 ], "CoP": [ 138 ], "(16.16": [ 139 ], "CaF2": [ 142 ], "at": [ 143 ], "25\u00b0C": [ 144 ], "1": [ 146 ], "atm.": [ 147 ], "Association": [ 148 ], "constants": [ 149 ], "reaction": [ 151 ], "enthalpies": [ 152 ], "complexes": [ 155 ], "with": [ 156 ], "boron,": [ 157 ], "calcium": [ 158 ], "iron": [ 160 ], "included": [ 162 ], "this": [ 164 ], "review.": [ 165 ], "The": [ 166 ], "excellent": [ 167 ], "agreement": [ 168 ], "computer-based": [ 171 ], "activity": [ 172 ], "products": [ 173 ], "suggests": [ 178 ], "chemistry": [ 181 ], "may": [ 185 ], "be": [ 187 ], "guide": [ 189 ], "evaluating": [ 191 ], "where": [ 195 ], "major": [ 196 ], "discrepancies": [ 197 ], "evident.": [ 199 ] }, "apc_list": { "value": 3690, "currency": "USD", "value_usd": 3690, "provenance": "doaj" }, "apc_paid": null, "authorships": [ { "author_position": "first", "author": { "id": "https://openalex.org/A5051428824", "display_name": "D. 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