...David K. Teertstra; Petr Cerny; Frank C. Hawthorne; Julie Pier; Lu-Min Wang; Rodney C. Ewing Abstract The rubidium analogue of microcline, rubicline, (Rb,K)AlSi 3 O 8 , ideally RbAlSi 3 O 8 , was found in a pollucite-bearing rare-element pegmatite at San Piero in Campo, Elba, Italy. Rubicline...

...F igure 7. Solution calorimetric data for microcline-rubicline crystalline solutions. Comparative data also are given for microcline-low albite, as well as Al-Si disordered phases sanidine, analbite, and Rb-sanidine (ScOc). ...

...F igure 1. Volume-temperature relations for Rb-sanidine (squares with crosses for ScOc; open squares from Henderson 1978 ), rubicline (inverted triangles for 0405), buddingtonite (filled triangles for good data; open triangles apparently reflecting loss of ammonia), K-microcline 71104 (filled...

...) identification of both rubicline triclinic with (Al,Si) ordered distribution and synthetic monoclinic RbAlSi 3 O 8 with (Al,Si) disordered distribution implies that Rb cannot be one of factors disrupting the (Al,Si) ordered and disordered distributions in feldspars; and (2) natural and synthetic feldspars...

...Fig. 2 Rock-forming K-feldspar in the b – c diagram for alkali feldspars; circles: CGR samples, triangles: SPG samples, crosses: LPG samples. Ideal low microcline (LM) data from Kroll & Ribbe (1987) , approximate rubicline (RBC) intermediate between the data of McMillan et al. (1980...

..., zeolites and titanite, among others. Although not on a quest to describe new mineral species, he has participated in the description of 17 new minerals, mostly phosphates, oxides and silicates from granitic pegmatites: stibiobetafite, parabariomicrolite, bobfergusonite, foordite, rossmanite, rubicline...

..., mostly phosphates, oxides and silicates from granitic pegmatites: stibiobetafite, parabariomicrolite, bobfergusonite, foordite, rossmanite, rubicline, ferrowodginite, titanowodginite, ferrotitanowodginite, xenotime-(Yb), bederite, ercitite, monazite-(Sm), oftedahlite, manitobaite, aspedamite...

... is more than 2000 times more abundant than Rb; Butterman & Reese Jr 2003 ). Only six valid IMA minerals contain essential Rb, none of which belong to the common rarity class of minerals. However, of these, two belong to common rock-forming groups of minerals, e.g ., rubicline is feldspar...

... from Trento in the last decade of the 19th century (detailed information about the origin of the studied sample is from Frederico Pezzotta, oral communication). This is also the type locality for rubicline ( Teertstra et al. 1998 ). The Elba granite pegmatites form a pegmatite field along the eastern...

... ) is inherent to a series of widespread minerals (albite, anorthite, sanidine, orthoclase and microcline) as well as some rare minerals (rubicline, buddingtonite, celsian, reedmergnerite and ferrisanidine). Feldspar topology is one of the five possible topologies in the feldspar group of minerals, namely...

... α), synthetic rubicline (Rb L α), synthetic NiTa 2 O 6 (Ta M α), and hafnon (Hf M α). Count times for all elements were 25 seconds or 0.5% precision, whichever was obtained first, except for Cs and Rb (100 seconds), and Hf (50 seconds). Also sought but not detected were La, Ce, Yb, P, Th, Pb, Ni, V...

... and petrology of late K-and Rb-feldspars in the Rubellite pegmatite, Lilypad Lakes, NW Ontario . Mineral. Petrol . 65 , 237 – 247 . Teertstra , D.K. , Černy , P. Hawthorne , F.C. , Pier , J. , Wang , Lu-Min & Ewing , R.C. ( 1998 a): Rubicline, a new feldspar from San...

... alteration from a proximal Rb-bearing host. Based on relatively high-temperature experimental work in the ternary Na–K–Rb feldspar system, Lagache (1998) found no apparent thermodynamic evidence for microcline-rubicline immiscibility at subsolvus conditions below 450 °C at 100 MPa; however...

...), rutile (Ti K α), synthetic MnNb 2 O 6 (Nb L α), vlasovite (Zr L α), zincite (Zn L α), phlogopite (F K α), pollucite (Cs L α), celestine (Sr L α), sanbornite (Ba L α), rubicline (Rb L α), synthetic NiTa 2 O 6 (Ta M α), and hafnon (Hf M α). Count times for all elements were 25 seconds or 0.5% precision...

..., laumontite, lepidolite, lillianite, löllingite, columbite-(Mn), metatorbernite, microlite, monazite-(Ce), mordenite, muscovite, orthoclase, petalite, pollucite, polycrase, pyrite, pyrophanite, pyrrhotite, quartz, rubicline, rutile, sekaninaite, sphalerite, stellerite, stilbite, synchisite-(Ce), titanite...