Zincsilite Mineral Data +

Fabre Minerals

General Zincsilite Information
Chemical Formula:	Zn3Si4O10(OH)2·4(H2O) (?)
Composition:	Molecular Weight = 574.58 gm
	Zinc      34.14 %  Zn   42.49 % ZnO
	Silicon   19.55 %  Si   41.83 % SiO2
	Hydrogen   1.75 %  H    15.68 % H2O
	Oxygen    44.55 %  O
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	Zn3Si4O10(OH)2·4(H2O)
Environment:	Pseudomorphs after diopside in a galena-sphalerite-chalcopyrite skarn. Forms a series with sauconite.
IMA Status:	Approved IMA 1960
Locality:	Batystau, central Kazakhstan. Link to MinDat.org Location Data.
Name Origin:	Name for the composition (Zinc Silicate).
Zincsilite Image
Images:	Zincsilite Comments: Chalky massive zincsilite. Location: Horado Mine, Horado Cho, Mugi Gun, Gifu, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Zincsilite Crystallography
Axial Ratios:	a:b:c =0.5561:1:1.6684
Cell Dimensions:	a = 5.1, b = 9.17, c = 15.3, Z = 2; beta = 90° V = 715.54 Den(Calc)= 2.67
Crystal System:	Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m ?
X Ray Diffraction:	By Intensity(I/Io): 15.3(1), 4.09(0.7), 1.528(0.6),
Physical Properties of Zincsilite
Cleavage:	[001] Perfect
Color:	Bluish white, White, Greenish white.
Density:	2.61 - 2.71, Average = 2.66
Diaphaniety:	Translucent to Opaque
Habit:	Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Hardness:	1.5-2 - Talc-Gypsum
Luster:	Pearly
Streak:	white
Optical Properties of Zincsilite
Gladstone-Dale:	CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2041,KPDmeas= 0.2049,KC= 0.2074
Optical Data:	Biaxial (-), a=1.514, b=1.559, g=1.562, bire=0.0480, 2V(Calc)=28, 2V(Meas)=0-22.
Calculated Properties of Zincsilite
Electron Density:	relectron=2.63 gm/cc note: rZincsilite =2.66 gm/cc.
Fermion Index	Fermion Index = 0.02334 Boson Index = 0.97666
Photoelectric:	PEZincsilite = 17.32 barns/electron U=PEZincsilite x relectron= 45.55 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Zincsilite is Not Radioactive
Zincsilite Classification
Dana Class:	71.3.1b.8 (71)Phyllosilicate Sheets of Six-Membered Rings
	(71.3)with 2:1 clays
	(71.3.1b)Smectite group (Trioctahedral Smectites)
	71.3.1b.1 Sobotkite? (K,Ca0.5)0.33(Mg,Al)3(Si3Al)O10(OH)2·1-5(H2O) Unk. Mono
	71.3.1b.2 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
	71.3.1b.2a Ferrosaponite! Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C? Mono
	71.3.1b.3 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
	71.3.1b.4 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m
	71.3.1b.5 Pimelite Ni3Si4O10(OH)2·4(H2O) Unk. Hex
	71.3.1b.6 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2·n(H2O) Unk (ORTH ?) Mono
	71.3.1b.7 Yakhontovite (Ca,K)0.5(Cu,Fe,Mg)2Si4O10(OH)2·3(H2O) C 2/m 2/m
	71.3.1b.8 Zincsilite Zn3Si4O10(OH)2·4(H2O)(?) C 2/m ? 2/m
Strunz Class:	VIII/H.20-60 VIII - Silicates
	VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups
	VIII/H.20 - Hectorite - Zincsilite series
	VIII/H.20-10 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m
	VIII/H.20-20 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
	VIII/H.20-27 Ferrosaponite! Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C? Mono
	VIII/H.20-30 Spadaite MgSiO2(OH)2·(H2O)(?) None
	VIII/H.20-40 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2·n(H2O) Unk (ORTH ?) Mono
	VIII/H.20-50 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m
	VIII/H.20-60 Zincsilite Zn3Si4O10(OH)2·4(H2O)(?) C 2/m ? 2/m
Other Zincsilite Information
References:	NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:	Links to other databases for Zincsilite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris Search for Zincsilite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Zincsilite : AA Mineral Specimens B & L Fine Minerals Crystal Vaults Dan Weinrich Fine Minerals Dan Weinrich Auctions e-Rocks Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals Rockshop.cz T G Fine Minerals Wrights Rock Shop Translate Zincsilite Mineral Data : Ask about Zincsilite here : Ask-A-Mineralogist from the Mineralogical Society of America Mindat.org's Discussion Groups Original Rockhounds Discussion Group Rockhounds Discussion Group on Yahoo Groups Mineral Discussion Forum from Fabre Minerals - also available in Español Print or Cut-and-Paste your Zincsilite Specimen Label here : Zincsilite Zn3Si4O10(OH)2·4(H2O) (?) Dana No: 71.3.1b.8 Strunz No: VIII/H.20-60 Locality:   Notes: