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Opal from
Lussat, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France


Locality type:Commune
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Lussat, Riom, Puy-de-Dôme, Auvergne-Rhône-Alpes, France
Data Identifiers
Mindat Occurrence Record ID:1004164
Long-form Identifier:1:3:1004164:4
GUID (UUID V4):9a88b829-be48-43f4-903f-7cacc9208a9d
References
Reference Search (possible matching items)
Journal (article/letter/editorial)
e) L u s s a t i t S. 351. - - f) A m o r p h e r Opal S. 351 II. Die V e r w a c h s u n g s f o r m e...entstehen durch Umkristallisation aus Cristobalit-Opal. Die Mehrzahl der Chalzedone enthalt sphiirolithische...wahrseheinlich keinen Opal im mineralogischen Shun, jedenfalls keinen Cristabolit-Opal. Der ,,Opal"-Gehalt ist...Versuchsgenauigkeit mit einer einfachen V~rteilungsflmktion, de r sog. sph~rischen Normalverteilung, die zun~chst...auffKllige Analogie zu dem in ebenschichtigem Cristobalit-Opal* gefundenen Pseudolussatin, ferner die sp/~ter (S
Journal (article/letter/editorial)
generalization. Keywords: silicification; fossil wood; opal-A; opal-CT; chalcedony; quartz 1. Introduction Citation:...presence of amorphous opal (opal-A), silica with incipient crystallization (opal-C/opal-CT); microcrystalline...eventually fills interstitial spaces, producing solid opal. Depending on the degree of order in the stacked...final product may be either precious opal or common opal. Amorphous opal is characterized by its relatively...contrast, most of the water in crystalline opals (opal-C and opal-CT) is adsorbed H2 O [14,15]. The structural
Book (volume)
Varieties: Lussatite; Opal, 280 Occurrence, 281 Historical, 283 Melanophlogite, 283 OPAL Mode of Aggregation...fine-grained varieties of quartz, together with opal, were known as distinct entities over 2000 years...identification of the so-called amorphous substance opal as a variety of cristobalite and the clarification...Zachariasen: Zs. Kr., 67, 226 (1928). Ww . Brill and De Bretteville: Am. Min., 33, 750 (1948); Winkhaus:...Weiss: Abh. Ak. Wiss. Berlin, Phys. Kl., 187, 1836. de Vries: Nature, 181, 1193 (1958). 8. 9. 10. 11.
Book (edition)
polished, 70 mm, Anjanabonoina, Madagaskar, G Page 5: Opal - fire, polished, 50 mm, Mezezo, Ethiopia, G Page..."Dana's System of Mineralogy•· ( 1944, I 951, 1962). de Fourestier (1999) and Strunz and Nickel (2001). Mi11eral...ASG -Archives de Science Geneve BM - Bulletin de la Societe fram;aise de mineralogie et de cristallographie...Freiberg, Germany, H Abernathyite, 12 mm, Ririera/, France, H Abhurite Sn2 /•O6'OH) 14Cl 1,, (3.D). Trigona]...luster metallic. H =2.5. Magnetic. Rare in the Cerro de Cacheuta di~t.. Mendoza prov.,Argentina. NJbMM 279
Journal (article/letter/editorial)
herrührend anzusehen. Ref.: A. S e l l a . 16. F. de Memme (in Genua): Ueber einige Cnprit- und Kalkspathkrystalle...Pont-du-Chäteau (Puy-de-Döme) sind mit einem dünnen, durchscheinenden Ueberzuge bedeckt, bestehend aus Opal und senkrecht...Erhitzen b e w a h r e n , während der umgebende Opal trübe wird. Noch dicker sind die ebenso beschaffenen...beschaffenen Ueberzüge auf den Chalcedonconcretionen von Lussat. Dieselbe Substanz kommt ferner vor in blauen Concretionen...Chalcedonstalaktiten und in grosser Menge im gelblichen Opal der Färöer, wo sie verhältnissmässig grobblätterig
Book (edition)
Br } .tu ERWIN NÄGELE) Gim, b.H. m ‚1928... De en MIKROSKOPISCHE PAHYSIOGRAPHIE MINERALIEN...199.7 Phys. ‚Chem: 199. Vork. 200. Literatur 202. Opal. . 156 ‚9168; . 165 . 166 »2167. 181. . 194 198... Inhalt. VII Seite ee ae N a en ee N Binnaniıer 7.“ a de N RAR PA ne unokalic. RE SR REST Ze Köoenenit. ...... . Gruppe der Ed rischen Karhakate ee ET Se De Chem. Zus., Morph. 217. Koh. 218. 8 ee RR ne, Ne REN...Vork. 252. Kaliophilit 255. Eukryptit 255. ea 255. De ee a, eek 2 207 Losit Spurrit i DD au Qu oO © © Hydronephelit
Book (edition)
Milan: ci1ed by I. von Born ( 1 790) Car. Foss. E. de Raab 1 . 142 (Adulairc). A more completely ordered...Data on new occurrence al Saint Pandclon. Landes. France. by B. Azambre and P. Monchoux ( 1 988) 8111/....by A . Des Cloizcaux ( 1 884) 8111/. Soc. Min. France, 1. 72. proved to carry two minerals. a manganiferous... 1 3 A . Z= l 6 [PDF 25-630) . (TI..) Margnac. France. Named for H . Agrin icr. Agstein. syn. of amber...shown to be a mixture of Ni(OH)2 • gibbsitc. and opal by G.S. Grit7�1cnko. N.K Aidinyan and V.P. Butuzov
 
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