Indigirite Mineral Data +

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General Indigirite Information
Chemical Formula:	Mg2Al2(CO3)4(OH)2·15(H2O)
Composition:	Molecular Weight = 646.85 gm
	Magnesium   7.51 %  Mg   12.46 % MgO
	Aluminum    8.34 %  Al   15.76 % Al2O3
	Hydrogen    4.99 %  H    44.56 % H2O
	Carbon      7.43 %  C    27.21 % CO2
	Oxygen     71.73 %  O
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	Mg2Al2(CO3)4(OH)2·15(H2O)
Environment:	Alteration zone.
IMA Status:	Approved IMA 1971
Locality:	Sarylakh Au-Sb deposit, Indigirka River, northeastern Yakutia, Russia. Link to MinDat.org Location Data.
Name Origin:	Named after the locality.
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Indigirite Crystallography
Crystal System:	MonoclinicSpace Group: Unk.
X Ray Diffraction:	By Intensity(I/Io): 5.8(1), 5.24(0.9), 7.62(0.9),
Physical Properties of Indigirite
Color:	Snow white.
Density:	1.6
Diaphaniety:	Translucent
Fracture:	Flexible - Flexible fragments.
Habit:	Acicular - Occurs as needle-like crystals.
Hardness:	2 - Gypsum
Luster:	Vitreous - Silky
Streak:	white
Optical Properties of Indigirite
Gladstone-Dale:	CI meas= -0.142 (Poor) - where the CI = (1-KPDmeas/KC) KPDmeas= 0.3044,KC= 0.2665
Optical Data:	Uniaxial (+), w=1.472, e=1.502, bire=0.0300.
Calculated Properties of Indigirite
Electron Density:	relectron=1.67 gm/cc note: rIndigirite =1.60 gm/cc.
Fermion Index	Fermion Index = 0.00868 Boson Index = 0.99132
Photoelectric:	PEIndigirite = 0.65 barns/electron U=PEIndigirite x relectron= 1.09 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Indigirite is Not Radioactive
Indigirite Classification
Dana Class:	16b.1.3.1 (16b)Carbonates - Hydroxyl or Halogen
	(16b.1)where (A)m (B)n (XO3)p Zq, with (m+n):p=1:1
	(16b.1.3)Dana Group
	16b.1.3.1 Indigirite Mg2Al2(CO3)4(OH)2·15(H2O) Unk. Mono
Strunz Class:	V/E.01-50 V - Nitrates, Carbonates and Borates
	V/E - Water-bearing carbonates with unfamiliar anions
	V/E.01 - Hydromagnesite - Brugnatellite series
	V/E.01-10 Hydromagnesite Mg5(CO3)4(OH)2·4(H2O) P 21/c 2/m
	V/E.01-15 Widgiemoolthalite (Ni,Mg)5(CO3)4(OH)2·4-5(H2O) P 21/c 2/m
	V/E.01-20 Dypingite Mg5(CO3)4(OH)2·5(H2O) Unk. Mono
	V/E.01-30 Giorgiosite Mg5(CO3)4(OH)2·5(H2O) ? Mono
	V/E.01-40 Artinite Mg2(CO3)(OH)2·3(H2O) C 2 or C 2/m Mono
	V/E.01-50 Indigirite Mg2Al2(CO3)4(OH)2·15(H2O) Unk. Mono
	V/E.01-60 Coalingite Mg10Fe2(CO3)(OH)24·2(H2O) R 3c 3 2/m
	V/E.01-70 Brugnatellite Mg6Fe(CO3)(OH)13·4(H2O) P 63/mmc 6/m 2/m 2/m
Other Indigirite Information
References:	NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
See Also:	Links to other databases for Indigirite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris Search for Indigirite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Indigirite : 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 Indigirite Mineral Data : Ask about Indigirite 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 Indigirite Specimen Label here : Indigirite Mg2Al2(CO3)4(OH)2·15(H2O) Dana No: 16b.1.3.1 Strunz No: V/E.01-50 Locality:   Notes: