 | | Report (issue) | | Magadiite Na2Si14O28(OH)2∙8H2O Crystal Data: Orthorhombic. Point Group: mm2. Crystals minute, thin...0262(9) c = 61.9608(46) Z = [2] X-ray Powder Pattern: Lake Magadi, Kenya. 15.41 (100), 3.44 (80), 3.146 (50)...5.82 15.22 100.00 (1) Lake Magadi, Kenya. (2) Alkali Lake Playa, Oregon, USA. (3) Na2Si14O28(OH)2∙8H2O...saline brines (Lake Magadi); in veins cutting playa sediments and in muds associated with alkali salts and...and brines (Alkali Lake Playa, Oregon); in altered volcanic rocks (Trinity Co., California); in marble xenoliths |  | | Journal (article/letter/editorial) | | AMERICAN MAGADIITE MINERALOGIST, VOL. 54, JULY_AUGUST, FROM ALKALI 1969 LAKE, OREGON Tnon,rs P...Academy Coloroilo Springs, Colorad.o80900. AssrnAcr Magadiite (NaSizOn(OH)a.3HzO) has been identified in veins...muds associated with alkali saits and brines at Alkali Lake playa, Oregon. Magadiite has apparently precipitated...result of pH changes on dilution by runoff. The magadiite veins may be related to syneresis cracking in...silicates, magadiite (NaSizOra(OH)3.3Hro) and kenyaite (NaSirOro,r[(oH)n. 3HrO), from Lake Magadi, Kenya |  | | Journal (article/letter/editorial) | | CONSTANTSAND GIBBS FREE ENERGIES OF FORMATION OF MAGADIITE AND KENYAITE TheJohns OwBx P. Bnrcron, Department...aryland'2I 218. Assrnect Thermodl'namic data for magadiite and kenyaite determined from solubility measurements...environments. Magadiite has been reported from four localities (Lake Magadi, Kenya; Alkali Lake, Oregon; Lac Tchad...Tchad, Africa; Trinity County, Calif.) t'here it is associated with either sodium bicarbonate or sodium...been observed only as an alteration product of magadiite in the High Magadi Beds in Kenya IxrnooucuoN |  | | Journal (article/letter/editorial) | | 881-885, 1997. NOTES THE LAYERED SODIUM SILICATE MAGADIITE: AN ANALOG TO SMECTITE FOR BENZENE SORPTION FROM...Key Words-Adsorption, Benzene, Intercalation, Magadiite, Smectite. INTRODUCTION Smectites have long been...within the interlayer is partially compensated by alkali and alkaline earth cations, particularly K, Ca...NOCs. Like smectite, the layered Na-silicate magadiite (Na2Si14029·9H20) is easily intercalated with...(Lagaly et al. 1975a). Magadiite was first identified by Eugster (1967) in Lake Magadi, Kenya, but it |  | | Journal (article/letter/editorial) | | No. 4. 478-480. 1998. NOTES CONTAMINATION OF MAGADIITE BY FLUORINE IN COMMONLY USED SYNTHETIC PROCEDURES...lakes of high alkalinity. This is the case for magadiite (Eugster 1967; McAtee et al. 1968; Rooney et al...Teflon-lined autoclave to 175°C for 21.5 h produced magadiite (Sprung et al. 1990). We have also used the same...same approach (Sprung et al. 1990), obtaining magadiite referred to as MAGI below. The X-ray powder diffraction...in our laboratory was always characteristic of magadiite. identical to previously reported patterns, with |  | | Journal (article/letter/editorial) | | AEM-TEM study of weathering and diagenesis, Abert Lake, Oregon: II. Diagenetic modification of the sedimentary...Baltimore, MD 2 12 18, USA *US Geological Survey, National Center, Reston, VA 22092 USA (Received July 3 1...in Abert Lake and surrounding playa with those of the weathered materials entering the lake in order...nearly trioctahedral. The very abundant Mg-rich lake smectites with an estimated composition &.Z,(Ab...that clay compositions primarily reflect changes in lake levels, brine composition, and source characteristics |  | | Report (issue) | | Clay Mineralogy of Pleistocene Lake Tecopa Inyo County, v y * California *• V-? •*' $ WE VET Ft Of...]PAfER Clay Mineralogy of Pleistocene Lake Tecopa, Inyo County, California By HARRY C. STARKEY and PAUL...GEOLOGICAL SURVEY PROFESSIONAL PAPER 1061 In a saline lake with pH above 8.5 authigenic sepiolite and detrital...Harry C. Clay mineralogy of Pleistocene Lake Tecopa, Inyo County, California. (Geological Survey Professional............................................... Magadiite ............................................. |  | | Journal (article/letter/editorial) | | Vol. 50, No. 5, 657–666, 2002. STABILITY OF MAGADIITE BETWEEN 20 AND 1008C M AR TI N D I ETZ EL 1 ,...to the solubility of natural and synthesized magadiite at elevated temperatures and in alkaline solutions...presented. The results show that the solubility of magadiite increases according to the expression ln(K mag)...the literature suggest that the formation of magadiite may be favored by a decrease of temperature and...dissolved silica species, the stoichiometry of magadiite, and the occurrence of negatively-charged species |  | | Journal (article/letter/editorial) | | hydrous sodium silicates from the northern bank of Lake Chad: occurrence, petrology and genesis D. Sebag...the Holocene in N'Guigmi interdunal depressions (Lake Chad), which led to the precipitation of various...types of hydrous sodium silicates, including magadiite, kenyaite, and zeolites. Scanning electron and...geochemical data con®rm the transformation of magadiite into kenyaite during its diagenetic evolution...reconstruction. The decrease in the abundance of magadiite concretions in the sedimentary sequence can probably |  | | Journal (article/letter/editorial) | | have formed in the evaporative setting of a playa-lake complex. Hydrologicallyand sedimentologicallysucha...bandediron-formations. Following a suggestionof Eugster (1969), magadiite or a sodiumsilicate gel are consideredto be the...the most likely precursorsof the bedded cherts. Magadiite solubility curves have a minimum with respect...Precipitation can take place in a fairly dilute lake. Most Precambrianmagadiite must have beenconvertedto...mineral common to iron-formations. Other reasonswhy magadiite or a sodium silicate gel are attractive as primary |  | Eypert-Blaison, C., Villiéras, F., Michot, L. J ., Pelletier, M., Humbert, B., Ghanbaja, J ., Yvon, J . (2002) Surface heterogeneity of kanemite, magadiite and kenyaite: a high-resolution gas adsorption study. Clay Minerals, 37 (3) 531-542 doi:10.1180/0009855023730056 | Journal (article/letter/editorial) | | 531–542 Surface heterogeneity of kanemite, magadiite and kenyaite: a high-resolution gas adsorption...layered silicates, Na-kanemite, Nakenyaite and magadiite, exchanged with H, K and Ca, were examined using...of platelets can be determined. In the case of magadiite exchanged with various cations, the stacking of...open six-membered rings at the surfaces of both magadiite and kenyaite. Furthermore, in the low-energy domain...between silica framework and argon atoms for both magadiite and kenyaite, contrary to what is observed for |  | | Journal (article/letter/editorial) | | 'C: Characterizationof SiOr-Y by comparisonwith magadiite Hlluro Muursnr Department of Chemistry, Fukuoka...Sior-y is magadiite (NarSi,oOrr.xHrO,x: 9-ll), which was discovered at Lake Magadi (an alkali lake), Kenya...amorphous silica was natural and synthesized magadiite is a sodium silicate investigatedin the 6inary...100-180'C at the autogenouspressureof an autoclaveat alkali-metal or alkaline-earth salt was added in aqueous...andconcentrationofalkali-metaland ways contain some alkali ions and ro u.. not crystal alkaline-earth salts |  | | Journal (article/letter/editorial) | | Mineralogist, Volume 60, pages 642-649, 1975 Magadiite and H-Magadiite: I. SodiumMagadiite and Someof Its Derivatives...NarSi,rOr" . 1l HrO. Thermal decompositionof magadiite dependsupon the interlayercation. With sodium...tridymite is formed above 700oC. Decomposition of magadiite with organic interlayer cations leads to quartz...sodium interlayer cations of synthetic and natural magadiite can be quantitatively exchanged by alkylammonium-...prepared by base exchangereactions. a synthetic magadiite have been used. The synthetic material has been |  | Barnes, Ivan, Presser, T.S., Saines, Marvin, Dickson, Peter, Van Groos, A.F.Koster (1982) Geochemistry of highly basic calcium hydroxide groundwater in Jordan. Chemical Geology, 35 (1) 147-154 doi:10.1016/0009-2541(82)90024-9 | Journal (article/letter/editorial) | | likely than Na20 because sodium silicates, such as magadiite and kenyaite (Eugster, 1967} form at lower pH-values...Eugster, H.P., 1967. Hydrous sodium silicates from Lake Magadi, Kenya: precursors of bedded chert. Science...House, R. and Eugster, H.P., 1968. Magadiite from Trinity County, California. Am. Mineral., 53: 2061--2069...Jones, B.F. and Neal, J.J., 1969. Magadiite from Alkali Lake, Oregon. Am. Mineral., 54: 1034--1043. Saines |  | | Report (volume) | | smectite, in altered Pliocene vitric tuff, Durkee, Oregon. See article by A.j . Gude 3rd, and R.A. Sheppard...13 Seasonal diagenetic changes in salts of Owens Lake, California, 1970-77, by George I. Smith and Irving...of the Morrison Formation, Smith Lake uranium district, McKinley County, New Mexico, by NeilS. Fishman...Miocene lacustrine deposit near Durkee, Baker County, Oregon, by Arthur J. Gude 3rd, and Richard A. Sheppard...Feldspar diagenesis in the Frio Formation, Brazoria County, Texas Gulf Coast: Geology, v. 9, p. 314-318. Li |  | | Report (issue) | | LITHOLOGY, MINERALOGY, AND PALEONTOLOGY OF QUATERNARY LAKE DEPOSITS IN LONG VALLEY CALDERA, CALIFORNIA By ...Isotopic data and inferences made from estimated lake water salinities and temperatures................. LITHOLOGY, MINERALOGY, AND PALEONTOLOGY OF QUATERNARY LAKE DEPOSITS IN THE LONG VALLEY CALDERA, CALIFORNIA...kilometers apart, in Long Valley caldera, Mono County, California, were studied using x-ray diffraction...deposited in or near the Pleistocene salinealkaline lake are described in detail. Fossil ostracodes and diatoms |  | | Report (chapter) | | including playas (Goudie 1973) upon which the Orcadian lake can be modelled (Parnell 1981). Much of the rock...fish after temporary incursions by the Orcadian lake into the southern area. In addition several beds...Algae made an important contribution to the Orcadian lake, one particular phase of which is represented by...of those cherts are comparable with these of Magadiite-type cherts, produced through a sodium silicate...nodules produced by precipitation from a stratified lake (Hay 1968; Eugster 1969) and from groundwater processes |  | | Report (issue) | | REsOURCES OF OREGON I SIXTH SUPPLEMENT I January l, 1971 to Dec ember 31, 1975 STATE OF OREGON DEPAIItTME:NT...GEOLOGY AND MINI!:RAL 1978 INDUSTRIES STATE OF OREGON DEPARTMENT OF GEOLOGY AND MINERAL INDUSTRIES 1069...1069 State Office Building Portland, Oregon 97201 BULLETIN 97 BIBLIOGRAPHY of the GEOLOGY and MINERAL...MINERAL RESOURCES S i xt h of OREGON Supplement January 1, 1971 to December 31, 1975 Compiled by...Va. 22041 with the assistance of Ainslie Bricker Oregon Department of Geology and Mineral Industries Edited |  | Sand, L. B., Mumpton, F. A. - Eds. (1978) Natural Zeolites - Occurrence, Properties, Use - A selection of papers presented at Zeolite, 76, an International Conference on the Occurrence, Properties, and Utilization of Natural Zeolites, Tucson, Arizona, June 1976. Pergamon Press, Oxford. | Book | | Offretite- Levynite Intergrowth from Beech Creek, Oregon, by Adsorption and Electron Diffraction J.M. Bennett...Zeolites R. L. Hay Zeolites in Saline, Alkaline-lake Deposits R. C. Surdam and R. A. Sheppard Geological... ...., Fig. 2. Analcime-rich tuffs in a saline-lake deposit near Wikieup, Arizona. This is probably...Bradley and C. S. Ross recognized zeolites in saline-lake beds of Wyoming and Arizona (Fig. 2), respectively;...1n "closed", saline-lake systems; (2) deposits formed in "open", freshwater-lake or groundwater systems; |  | | Report (issue) | | found even at ambient temperatures in evaporitic lake basins in some East African Rift valleys in Kenya...high-pH sodium-carbonate brines like Lake Magadi (Kenya) and Lake Natron (Tanzania) in Africa’s Eastern...leucitite, and carbonatite (Western Rift, Uganda) 4 Alkali rhyolite (Eastern Rift, Kenya) 4 480 to 1,400...sandstone (“posthalite” water), Paradox Basin, Grand County, Utah, United States 1 Sandstone and anhydrite...rocks and limestone — — — — — Surface water—Lake Tulusia of the Momela Lakes, Eastern Rift Valley |  | | Book | | fan-ephemeral saline lake.] 81 Sabkha Yotvata, Israel.181 Basin and Range playas, USA.182 Salars of South...field-ephemeral saline lake.201 Lake Eyre, Australia.202 Lake Frome, Australia.208 Lake Callabonna, Australia...210 Perennial stream floodplain-perennial saline lake.210 Eolian sabkhas. 211 Sea-margins with elongate...230 Coastal salinas of the Middle East.231 Solar Lake. Gulf of Elat.231 Ras Muhammad Pool, Southern Sinai...saline lakes.238 Great Salt Lake, Utah.239 Mono Lake, California.243 Lake levels and conditions.244 Tufa |  | | Report (issue) | | . . . . . . . . . . . . . . . . . . . . . . ~ 1 Lake hydrology . . . . . . . . . . . . . . . . . . ....are given. Six general categories are considered: Lake hydrology; interaction of lakes and streamflow,...of water-quality characteristics. The category of lake hydrology includes general studies of lakes that... of hydrodynamics of lakes as well as studies of lake-level fluctuations. The category of interaction...Susquehanna River Basin: Part !-Effects of Raystown Lake on the water-quality changes of lakes and reservoirs: |  | | Book | | crystal drawings for publication. H. Earl Pemberton Lake Elsinore, California Contents Preface / v 1...in the state is geomorphic provinces From the lake-bed deposits of the Basin Ranges and Mojave come...species are reported by 1-2 shows the county boundaries and county names. When possible, locations of mines...within a township is illustrated by Figure 1-1. county of occurrence. Map *M. Fleischer’s 1980 Glossary...Map 1-2. Outline map of California showing county boundaries. 4 MINERALS OF CALIFORNIA R5W i |  | | Report (issue) | | A293-A298 of this chapter. Numerous Federal, State, county, 1and local agencies and other organizations and...___ _ Washington ___________________________ _ Oregon _______________________________ _ California _...cooperators ____________________________ _ 251 State, county, and local cooperators ______________ _ 251 Other...geochronologic studies in the Bodie district, Mono County, Calif., by M. L. Silberman and F. J. l{leinhampl...rocks from the Gold Acres open-pit mine, Lander County, north-central Nevada. Titanium, chromium, calcium |  | | Journal (article/letter/editorial) | | ALBITET VARIETY ALFRED CARY HAhIKINS.* S ALKALI LAKE' OREGON.* t ALKALTS BY CALC-ALKALIC ALL-UNION I{INERALOGICAL...tES DABNEY CHANGESII,I THE EASTERN $ RETENTION OF ALKALI,S BY AND RELATIONS IN THE AND BARIUI,lFELDSPAR...L L IN E S O L U T I O N S : I I I FROH TRTNITY COUNTY AND FERRIERITE FROM AGOURAI FROII SOUTHEASTERN...T( $ LAC ST. JEAN, QUEBEC.* ' LAKE' CALIFORNIA.{. $ A sEcoN LAKE, OREGON.* $ L ASER- EIIII SSI ON SL A...HAGADIITE AND KENYAITE.* $ }IAGADI I TE FROI'I ALKALI LAKE' MAGADIITE IN AIR, IN VACUO ! ' I A G M AS E R I E |
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Alkali Lake, Lake County, Oregon, USA