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Download the Scanned American Mineralogist, Volume 70, pages 871-381, 1985 NEW MINERAL NAMES Psrn J. DuNN, Mtcnln Fr,Erscrmn,RrcrHno H. Leucr,By, Jnlcs E. Srucr,nv, AND JANETA. Ztt cznn Agardite{La)*, AgarditdCe) + 0.11', Z:L D (calc)for the synthetic:9.06. The strongest pattern (47 given) are: 3.05(10[114), T. Fehr and R. Hochleitner (1984)Agardite-(La). A new mineral lines in the X-ray diffraction from Lavrion, Greece,Lapis, l/84,22 and 37 (in German). 2.80(7-SX 303), and 2.84\7\1210\. Color is yellow brown to orang€ brown; powder grayish XRF-analysesindicated the occurrenceof agardite-(La),Ce-rich yellow; luster nearly adamantine; transparentin fine fragments; agardite (called agardite-(Ce))as well as mixed crystals of both. cleavageparallel to elongation; Brittle; hardnessabout 3; micro- Identification was confirmedthrough comparisonwith Modreski's hardness 198-245(ave. 2l9l kg/sq. mm; polishes well; sections original data for type material of agardite-(La).X-ray data arc becomecovered by a bluish or bluish-violet film. In transmitted nearlyidentical for all compositions. light is transparent, anisotropic from dark brown to blue-gray; Minerals occur in the oxidation zone in the mining district of pleochroic from pale brownish-yellowto light brown, n's above Kamat'rzanear Laurion, Greece.Both end memberscommonly 2.0. In reflected ligbt, gray with bluish tint, reflectances(max. and form spherical to rosettelike aggregates(up to 3 mrn dia.) of min., %): 460 nm, 22.8, 18.5;546nm, 20.4,16'l; 590 nm' 19.7, needlelike crystals occurring in limonite voids. They are usually 15.8;656nm, 18.5,14.5. younger than associatedsmithsonite, aurichalcite, hydrozincite, The mineral occursin oxidized,complex Sb-As-Hg ores of the azurite, cuproadamite, calcite, and chrysocolla, rarely with Al- Khaidarkan deposit, Kirgiz S.S.R., associated with calomel, adamite on zincalurninite,gibbsite, etc. Color rangesfrom nearly eglestonite, terlinguaite, corderoite, montroydite, kuznetsovite, gleen colorlessto yellowishgreen to commonly intensebluish and shakhovite,poyarkovite, and native Hg, in grainsup to 0.2 mm. doesnot correlatewith composition. The name is for the artist Lyudmila Alekseema Chursina. Type material is at the Central Siberian Geol. Museum, Novosibirsk. Discussion M.F, The narne agardite{La) was previously approved by I'M.A. (Am. Mineral. 67,lMl (1982)),however, a formal descriptionhas not yet beenpublished. The name agardite-(Ce)has not beensub- Earlshannonite* mitted or approved.No quantitativedata are given.V.G. D. R. Peacor, P. J. Dunn, and W. B. Simmons (1984)Earlshan- nonite, the Mn analogueof whitmoreite,from North Carolinia. Can.Mineral., 22,47 147 4' Bulaiinite Microprobe analysis gave AlrO. 0.1, FerO. 33.8' FeO 4.6' I. V. Nikolaeva (1977)Minerals of the glauconite group in sedi- MgO 0.8,CaO 0.6, MnO 8.2, P2O530.0, HrO (by difference)21.9' mentary formations. Novosibirsk, Nauka, p. 46; from an ab- sum 100.07o,corresponding to (Mno.r, Feo.roMgo.o" Cao.orto.", stract in Zapiski Vses.Mineralog. Obshch., 113,379. (Fet.t,o Alo.ol)"r.o, (POo)r.oo (oH)r.ot '4.75H2O, or ideally Name given to the Mg, Fe2* end-memberof the glauconite MnFe;+(PO4)2(OH)r'4H2O. There was inadequatematerial for group. The nameis for the Bulaisk formation, easternSiberia. the direct determination of water content. The oxidation state of Fe was determinedon the basisof microchemicaltests and on the Discussion known structural relationshipsof the Fe analogue,whitmoreite. This name, not having been approved by the I. M. A., has no Microprobe analysisof earlshannonitecrystals from a secondoc- validity. M.F. currenceat Hagendorf,Germany, yielded a similar composition. X-ray study by precessionand Weissenbergmethods shows the mineral to be monoclinic, space grotp P2tlc, unit cell a : 9.910(13),b : 9.669\8), c : 5.a5s(9)A, f : 93.9s(9)",Z : 2. v. r. vasil,iev,yu, G. J:ftT::d N. A. pafchik(reE4) The strongest lines (41 given; FeKa radiation, Si internal stan- Chursinite,(Hgr)r(AsOj., a new natural mercury ar*nate. Za- dard) are 9.8(100X100);6.9(80X110), 4.18(60X111)' 3.4s(ffi\22o)' piski Vses.Mineralog. Obshch., ll3,34l-347 (In Russian). 2.8s 6{ffiX22r), 2.789(70X3 I I ). The mineral o@urs as prismaticeuhedral crystals up to 0.5 mm The averageof 6 microprobe analysesgave Hg 81.28(+0.73), in length elongateon with forms {100}, and {011}. As 9.74(+0.15), O 9.57(+0.29), sum 100.59wt.%, corresponding [001] {110}, They are twinned on and typically exhibit parallel growth to Hgu.ooAs,gsOa.so or Hg"Asj+O". However,the X-ray data {100}, with in common.The crystalscommonly form radial, hemi- agreewith those for synthetic(Hgr).(AsOn), (Kamener and Kait- [0Of] spherical aggregates.The mineral is reddish brown, transparent, ner, Acta Cryst., 29B, 166G1669(1973)), and this formula is ac- with a vitreous luster and brittle tenacity.It does not fluorescein cepted.Presumably it is Hgl+Hg3+(AsO4)3. ultraviolet light. H 34. Two poor cleavageswere obscrved on Single-crystalstudy showedchursinite to be monoclinic, P2t/c, crushedgrains; one is likely {100}. Fracture even.D (heavyliquid) with a : 8.71+0.02, b : 5.08+0.02, c : 15.66+0.02A, P : tZg.Zl 2.9A(\ glcm3, 2.92 g/crnt (calc.). Optically biaxial, negative' a : r.696{4), f : LTas@), y : r.765(4\, 2u,: 64(4)". Moderate * Minerals marked with asteriskswere approved before pub- pleochroism:X:Y:light yellow brown, Z:yellow brown. lication by the Commissionon New Minerals and Mineral Names Absorption Z>X-Y, Z:c. Crystals from Hagendorf are of the International MineralogicalAssociation. bright yellow. 0003-004x/8s/0708-o87 I $02.00 872 NEW MINERALNAMES Earlshannonitewas found on the dumps of the Foote Mineral the melilite group. Jeffreyiteis orthorhombic (althoughdimension- Company's spodumenemine near the town of Kings Mountain, alfy pseudotetragonalwith a: b), space group C222r, unit cell ClevelandCounty, North Carolina. The mineral was not found in a: 14.9O,b : 14.90,c : 4O.4lA,Z : 64. The strongestlines (62 place in the pegmatitebody. Associatedminerals include mitrida- given) are 5.00(40X008,026),2.993(90X408), 2.774O0oX428), tite, laueite, rockbridgeite,a jahnsite-group mineral, quartz, and 2.54r(60xi444,ffi.16),236q4ox620), 1.755(50X660). an unidentified amorphous Mn oxide. The mineral is among the The mineral occursas thin pseudotetragonalplates up to 1 mm last speciesto form in the sequenceof late stagesecondary phos- acrossalong with colorlessgrossular in a cavity in a rodingitized phates.Crystals from Hagendorf occur with frondelite and rock- dike exposedin the Jeffrey open pit at Asbestos,Shipton Town- bridgeite. ship, Richmond County, Quebec,Canada. It is colorless,transpar- The mineral is named for the mineralogistand chemistEarl V. ent, and brittle, and has a micaeousappearance so that it can be Shannon(1895-1981) of the U.S. National Museum.Type materi- mistakenfor a mica. Cleavagesperfect: {ffil} and {110}. No reac- al is deposited in the Smithsonian Institution under catalogue tion to UV radiation. Not readily soluble in 20% HCl. H 5. D #NMNH150168. J.E.S. 2.99 (hydrostatic suspension),2.98 calculated. Optically biaxial negative,a : 1.625,f : l.6al, y : 1.643,2U-: n" meas.,39' calc. Optical orientations f lla,Xllc. Twinning on (100). Jask6lskiite* The name is for the Jeffrey mine. Type material is preserved_at M. A. Zakrzewski (1984)Jask6lskiite, A new Pb-Cu-Sb--Bi sul- the National Museum of Natural Sciences.Ottawa. J.ES. fosalt from the Vena Deposit, Sweden.Can. Mineral., 22,481- 485. E. Makovicky, W. G. Mumme and R. Norrestam (1984)The crys- Jeppeite* tal structures of izoklakeite, dadsonite and jask6lskiite. Acta M. W. Pryce,L. C. Hodge and A. J. Criddle (1984)Jeppeite, a new Crystallogr. A40, Supplement,International Union of Crystal- K-Ba-Fe titanate from WalgideeHills, WesternAustralia. Min- lography, Thirteenth Intemational Congress, Communicated eral.Mag.,48,263-6. Abstracts,p. C-246. A. N. Bagshaw,B. H. Doran, A. H. White and A. C. Willis (1977) Jask6lskiite(ideal composition Pbr*,Cu,(Sb, Bi)r_,S.; Sb ex- Crystal structure of a natural potassium-bariumhexatitanite ceedsBi and x :0.2) has beenfound in the Vena deposit,Bergsla- isostructuralwith KrTi.Or.. Aust.J. Chem.,30, f 195-1200. gen, Sweden.Microprobe analysis yield Pb 50.74, Cu 1.31, Sb Report of the Government Chemical Laboratories Western Aus- 15.'14,Bi 14.35, S 17.51; sum 99.65%. This gives the formula tralia for the year 1980,p. 24. Pbr r.Cuoresbl r?Bio.62ss. Powder and singlecrystal X-ray diffraction show the mineral to Jeppeite (ideal composition (K,Ba)r(Ti,Fe)"Or.) is found as be orthorhombic,space group Pbnm, a : 11.331(1),b:19.871(2), small crystals(up to 2 x 2 mm) in a weatheredlamproite at Wal- c : 4.100(l)A,Z:4, D calc.: 6.47 g/cm3.The strongestX-ray gideeHills, Kimberly Division, WesternAustralia. The averageof lines (71 given)are 3.710(100X310),3.595(50X121), 3.333(60X131), seven microprobe analysis yields KrO 8.47, BaO 17.35,TiO2 (total 2.e70(8O\23r), 2.76r(6OX24r), 2.75 1(s0X3 I l), 2.0s(50[002). rhe 69.29,Fe"O, Fe) 4.74; sum 99.85% with Mg, Na and Zr detected. This analysis gives crystal structure determination shows that this is the fourth the formula (K,. j.)", number of the meneghinitehomologous series. rrBao.r.)"r rr(Tir ruFel noOr.. Powder diffraction data were indexed on monoclinic The mineral is found intergrown with izoklakeite, native bis- a cell (C2lm) with a: 15.543(3),b : 3.8368(7),c:9.r23(2)4, and muth, galena,pyrrhotite, and occasionallyantimony to form ag- :99.25(l): The strongest X-ray lines ('12 given) are gregatesup to a few millimetersin diameter.It is lead-graywith a f dark gray streak and a metallic 3.07(r0x310),2.ee0(10x003,311), 2.812(10y.3rr,rr2), 2.09r(6), luster.
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