Zinnwaldite, KLiFeAl(AlSi3)O10(OH,F)2, potassium lithium iron aluminium silicate hydroxide fluoride is a silicate mineral in the mica group. The IMA status is as a series between siderophyllite (KFe2Al(Al2Si2)O10(F,OH)2) and polylithionite (KLi2AlSi4O10(F,OH)2) and not considered a valid mineral species.[4]
^Rieder, M.; Hybler, J.; Smrcok, L.; Weiss, Z. (1996). "Refinement of the crystal structure of zinnwaldite 2M_1". European Journal of Mineralogy. 8 (6): 1241–1248. doi:10.1127/ejm/8/6/1241.
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zinnwaldite, klifeal, alsi3, potassium, lithium, iron, aluminium, silicate, hydroxide, fluoride, silicate, mineral, mica, group, status, series, between, siderophyllite, kfe2al, al2si2, polylithionite, kli2alsi4o10, considered, valid, mineral, species, fluorap. Zinnwaldite KLiFeAl AlSi3 O10 OH F 2 potassium lithium iron aluminium silicate hydroxide fluoride is a silicate mineral in the mica group The IMA status is as a series between siderophyllite KFe2Al Al2Si2 O10 F OH 2 and polylithionite KLi2AlSi4O10 F OH 2 and not considered a valid mineral species 4 ZinnwalditeFluorapatite with topaz on zinnwaldite and quartzGeneralCategoryPhyllosilicate mineralFormula repeating unit KLiFeAl AlSi3 O10 OH F 2IMA symbolZnw 1 Crystal systemMonoclinicCrystal classPrismatic 2 m same H M symbol Space groupCc no 9 Unit cella 5 29 b 9 14 c 10 09 A b 100 83 IdentificationColorGray brown yellow brown pale violet dark green color zoning commonCrystal habitWell formed short prismatic or tabular crystals pseudohexagonal in rosettes or fan shaped groups lamellar or scaly aggregates disseminated TwinningOn composition plane 001 twin axis 310 CleavagePerfect basal 001 FractureUnevenTenacityLaminae exible elasticMohs scale hardness3 5 4 0LusterPearly to vitreousStreakWhiteDiaphaneityTransparent to translucentSpecific gravity2 9 3 1Optical propertiesBiaxial Refractive indexna 1 565 1 625 nb 1 605 1 675 ng 1 605 1 675Birefringence0 040 0 050PleochroismDistinct X colorless to yellow brown Y gray brown Z colorless to gray brown2V angle0 40 References 2 3 4 5 Name and discovery EditIt was first described in 1845 in Zinnwald Cinovec on the German Czech Republic border 4 Occurrence EditIt occurs in greisens pegmatite and quartz veins often associated with tin ore deposits It is commonly associated with topaz cassiterite wolframite lepidolite spodumene beryl tourmaline and fluorite 2 References Edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 a b Handbook of Mineralogy Webmineral data a b c Mindat Rieder M Hybler J Smrcok L Weiss Z 1996 Refinement of the crystal structure of zinnwaldite 2M 1 European Journal of Mineralogy 8 6 1241 1248 doi 10 1127 ejm 8 6 1241 This article about a specific silicate mineral is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Zinnwaldite amp oldid 1138743714, wikipedia, wiki, book, books, library,
