arcanite


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arcanite

[′är·kə‚nīt]
(mineralogy)
K2SO4 A colorless, vitreous orthorhombic sulfate mineral. Also known as glaserite.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The probable potential minerals in organic plant tissues according to the XRD database were: arcanite ([K.sub.2]S[O.sub.4]), calcium borate hydrate ([Ca.sub.3] [(B[O.sub.3]).sub.2]*[H.sub.2]O), calcium silicide (Ca[Si.sub.2]), cristobalite (Si[O.sub.2]), celestine (SrS[O.sub.4]), calcium phosphate (CaHP[O.sub.4]), hydrogrossular ([Ca.sub.3][Al.sub.2][(Si[O.sub.4]).sub.3-x][(OH).sub.4x]), manganite (MnO(OH)), potassium nitrate (KN[O.sub.3]), potassium oxalate hydrate ([K.sub.2][C.sub.2][O.sub.4].
As another example, the mineral arcanite ([K.sub.2]S[O.sub.4]) is typically present in small amounts, usually less than 1 % by mass, in portland cement clinker.
The presence of syngenite, as seen in XRD patterns, suggests possible pre-hydration or cement storage issues as it generally represents a reaction between arcanite (or other alkali sulfates) and gypsum.
The salicylic acid and methanol (SAM) extraction dissolves alite ([C.sub.3][S.sup.1]), belite ([C.sub.2]S), and free lime (CaO), leaving behind a residue of the tricalcium aluminate ([C.sub.3]A) and ferrite ([C.sub.4]AF) interstitial phases as well as minor phases including periclase (MgO) and alkali sulfates such as arcanite (K[bar.S]), thenardite (N[S.sub.S]), and langbeinite (K[M.sub.2] [[bar.S].sub.3]), calcium sulfates (gypsum, bassanite, and anhydrite), and carbonates (calcite and dolomite).
1 = alite 2 = belite 3 = aluminate 4 = ferrite 5 = periclase 6 = arcanite 7 = aphthitalite 8 = void Record the index designations for later use as some phases will be absent from some materials.
For example, arcanite (K[bar.S]) contains only potassium and sulfur, so if the potassium X-ray map is assigned to the green channel and the sulfur X-ray map is assigned to the yellow channel, pixels belonging to arcanite will be white (see Fig.
(116) See Arcanite Fishing Pole, WORLD OF WARCRAFT: WARLORDS OF DRAENOR GAME GUIDE, http://us.battle.net/wow/en/item/105685 ("Binds when picked up ....") (last visited May 3, 2015).
4 and K4 are particularly interesting, as a lot of the initial compounds are still present, for example arcanite [K.sub.2]S[O.sub.4], marcasite Fe[S.sub.2], and potassium calcium sulphate [K.sub.2][Ca.sub.2]([S[O.sub.4]).sub.3].
Compositional estimates Type I/II Mass fraction % ASTM C 150 XRD Alite 62.5 62.1 Belite 11.4 12.1 Aluminate 7.2 4.5 Ferrite 8.0 9.7 Arcanite 0.4 Periclase 2.3 Gypsum 0.7 Bassanite 3.1 Anhydrite 0.3 Dolomite 0.8 Calcite 0.5 Quartz 0.2 Table 3.