1-20 OF 24 RESULTS FOR

varulite

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 October 1957
American Mineralogist (1957) 42 (9-10): 661–664.
..., a mineral outside of this system. No success has been obtained in attempting to write a formula showing a simple coupling arrangement involving Ca-X and Na-Y. Thus the varulites are high in Na and low in Fe‴. Nevertheless it seems clear that these minerals are all members of one monoclinic isotypous series...
Journal Article
Published: 01 August 2012
The Canadian Mineralogist (2012) 50 (4): 913–931.
... in these nodules. One of them is beusite–wyllieite–sicklerite-rich (BWS), with varulite and staněkite among the main products of replacement, Fe/(Fe + Mn) values between 0.46 and 0.48 for sicklerite, and MgO values up to 2.14 wt%. The other association is lithiophilite–sicklerite-rich (LS), with varulite...
FIGURES | View All (8)
Journal Article
Published: 01 July 2019
European Journal of Mineralogy (2019) 31 (4): 807–822.
...) octahedral sites. For phosphates, the root name is defined on the basis of the M (2) content, allowing a valency-imposed double-site occupancy for that site: M 2 (Fe 3+ Fe 3+ ) = alluaudites s.l ., M 2 (Fe 2+ Fe 3+ ) = hagendorfites s.l ., and M 2 (Mn 2+ Fe 3+ ) = varulites s.l . The root-name is used...
FIGURES | View All (10)
Journal Article
Published: 01 April 1990
American Mineralogist (1990) 75 (3-4): 401–404.
...Joel D. Grice; Pete J. Dunn; Robert A. Ramik Abstract Jahnsite-(CaMnMn), a new mineral species from Mangualde, Beira, Portugal, occurs as equant, brownish yellow crystals to 0.5 mm, associated with phosphosiderite, zodacite, varulite, and microcline. The mineral is transparent and has a vitreous...
Journal Article
Published: 01 December 1971
American Mineralogist (1971) 56 (11-12): 1955–1975.
...Paul B. Moore Abstract Three-dimensional crystal structure analysis of an alluaudite from the Buranga pegmatite, Central Africa, elucidated the crystal chemistry of the alluaudites (hagendorfite, hiihnerkobelite, varulite, mangan-alluaudite, alluaudite, and the arsenate mineral caryi-nite). R ( hkt...
Journal Article
Published: 01 June 1966
American Mineralogist (1966) 51 (5-6): 935–939.
... that it was different from type arrojadite and similar to the material from Norrö, Sweden and to some varulites. Lindberg's work was valuable in helping to clear up some confusion, but a new mineral name should not have been suggested on the basis of such scanty data. Nevertheless, the name was enshrined in Danas...
Image
Photomicrographs of the main textures observed in the BWS association from ...
Published: 01 August 2012
of varulite. c) Olive-green qingheiite containing rounded crystals of sicklerite, generally surrounded by a rim of deep yellow varulite. d) Extensive replacement of sicklerite (orange relics) by deep yellow varulite, and with staněkite occurring interstitially. e) Same as b) along with an idiomorphic crystal
Image
Cationic distribution on the  M (2) site of alluaudite-type phosphates. Bla...
Published: 01 July 2019
Fig. 2 Cationic distribution on the M (2) site of alluaudite-type phosphates. Black circles = type alluaudites ( Damour, 1847 , 1848 ), stars = type hagendorfites ( Strunz, 1954 ), triangles = type varulites ( Quensel, 1937 , 1940 ).
Image
Mössbauer spectra and Fe coordination polyhedra created using CrystalMaker ...
Published: 01 May 2014
is shown as a thin solid line in gold. Alluaudite ( Moore 1971a ) ML-P40 and “ferroalluaudite” ML-P14 ( Corbin et al. 1986 ) are predominantly Fe 3+ in the M2 site. Two samples of hagendorfite, DD184 and DD237 ( Redhammer et al. 2005 ), and varulite DD321 contain multiple doublets of Fe 2+ and Fe 3
Journal Article
Published: 01 June 2004
The Canadian Mineralogist (2004) 42 (3): 697–704.
... . Fisher , D.J. ( 1957 ): Alluaudites and varulites . Am. Mineral . 42 , 661 – 664 . Fisher , D.J. ( 1958 ): Pegmatite phosphates and their problems . Am. Mineral . 43 , 181 – 207 . Fontan , F. ( 1978 ): Etude minéralogique et essais expérimentaux sur des phosphates de...
FIGURES | View All (5)
Journal Article
Published: 01 July 2007
European Journal of Mineralogy (2007) 19 (4): 589–592.
... – 2764 . Björling , C.O. , Westgren , A. ( 1938 ): Minerals of the Varuträsk pegmatite. IX. X-ray studies on triphylite, varulite, and their oxidation products . Geol. Fören. Förhandl ., 60 , 67 – 72 . Bragg , W.L. , Brown , G.B. ( 1926 ): Die Struktur des Olivins...
FIGURES
Journal Article
Published: 01 May 2014
American Mineralogist (2014) 99 (5-6): 914–942.
... is shown as a thin solid line in gold. Alluaudite ( Moore 1971a ) ML-P40 and “ferroalluaudite” ML-P14 ( Corbin et al. 1986 ) are predominantly Fe 3+ in the M2 site. Two samples of hagendorfite, DD184 and DD237 ( Redhammer et al. 2005 ), and varulite DD321 contain multiple doublets of Fe 2+ and Fe 3...
FIGURES | View All (13)
Journal Article
Published: 07 August 2018
Mineralogical Magazine (2018) 82 (4): 1015–1021.
... of fupingqiuite As a side effect of the new classification of alluaudites, the mineral fupingqiuite (IMA 2016-087; see CNMNC Newsletter 35) is not a separate species from varulite and has been discredited. ERRATUM The file on jahnsite-(NaMnMg) published in Newsletter 43 was wrong. The correct one...
Journal Article
Published: 01 July 2018
European Journal of Mineralogy (2018) 30 (4): 877–882.
... of alluaudites, the mineral fupingqiuite (IMA 2016-087; see CNMNC Newsletter 35) is not a separate species from varulite and has been discredited. The file on jahnsite-(NaMnMg) published in Newsletter 43 was wrong. The correct one is included in this Newsletter. IMA No. 2018-036 Hg 3...
Journal Article
Published: 01 October 2007
The Canadian Mineralogist (2007) 45 (5): 1307–1324.
..., vanmeersscheite, vantasselite. varulite, whitlockite, whitmoreite, wooldridgeite, xenotime-(Yb) and zapatalite. The data used to calculate the Gladstone–Dale compatibility of the phosphate minerals were taken from the International Encyclopedia of Minerals , which contains 437 such species. Only 348...
Journal Article
Published: 01 April 2014
The Canadian Mineralogist (2014) 52 (2): 321–335.
..., Pollc: pollucite, Py: pyrite, Qng: qingheiite, Qtz: quartz, Sk: sicklerite, Spd: spodumene, Sps: spessartine, Src: sarcopside, Srl: schorl, Trph: triphylite, Trpl: triplite, Tur: tourmaline, Ura: uraninite, Vr: varulite, Wolf: wolfeite, Wyl: wyllieite, Zrn: zircon, Zws: zwieselite. n.d.: not determined...
FIGURES | View All (4)
Journal Article
Published: 01 November 2005
European Journal of Mineralogy (2005) 17 (6): 915–932.
... from these main constituents, Li+, K+, Mg 2+ , Zn 2+ and Al 3+ are found in natural alluaudite-type compounds ( Moore, 1971 ; Moore & Ito, 1979 ). Depending on chemistry and cation site distribution on M(1) and M(2), mineral species are classified into varulite, alluaudite, ferroalluaudite...
FIGURES | View All (10)
Journal Article
Published: 01 May 2006
European Journal of Mineralogy (2006) 18 (3): 337–344.
... studies on triphylite, varulite, and their oxidation products . Geol. Fören. Förhandl ., 60 , 67 – 72 . Bragg , W.L. & Brown , G.B. ( 1926 ): Die Struktur des Olivins . Z. Kristallogr ., 63 , 538 – 556 . Burns , R.G. ( 1970 ): The crystal field spectra and evidence...
FIGURES | View All (5)
Journal Article
Published: 01 February 2016
Mineralogical Magazine (2016) 80 (1): 103–126.
FIGURES | View All (5)
Journal Article
Published: 01 May 2010
American Mineralogist (2010) 95 (5-6): 844–852.
... ], and varulite [NaCaMnMn 2 (PO 4 ) 3 ]. Over the past 20 years, many synthetic alluaudite-type phosphates, arsenates, and molybdates have been reported (see Keller et al. 1981 ; Riffel et al. 1985 ; Keller and Hess 1988 ; Auernhammer et al. 1993 ; Solodovnikov et al. 1998 ; Hatert et al. 2000...
FIGURES | View All (9)