Aminoffite Mineral Data +

Excalibur Minerals

General Aminoffite Information
Chemical Formula:	Ca3Be2Si3O10(OH)2
Composition:	Molecular Weight = 416.52 gm
	Calcium    28.87 %  Ca   40.39 % CaO
	Beryllium   4.33 %  Be   12.01 % BeO
	Silicon    20.23 %  Si   43.28 % SiO2
	Hydrogen    0.48 %  H     4.33 % H2O
	Oxygen     46.09 %  O
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	Ca3Be2(Si3O10)(OH)2
Environment:	In fluorite veins in the Dugdinsk Massif, Tuva, Siberia, Russia.
IMA Status:	Valid Species (Pre-IMA) 1937
Locality:	Langban, Varmland, Sweden. Link to MinDat.org Location Data.
Name Origin:	Named for Gregori Aminoff (1993-1947), Swedish Mineralogist and crystallographer.
Synonym:	ICSD 32654
	PDF 23-80
Aminoffite Image
Images:	Aminoffite Comments: Clear, pyramidal aminoffite crystal. Location: Langban, Varmland, Sweden. Scale: Size Not Given. © Lou Perloff / Photo Atlas of Minerals
Aminoffite Crystallography
Axial Ratios:	a:c = 1:1.00658
Cell Dimensions:	a = 9.865, c = 9.93, Z = 4; V = 966.37 Den(Calc)= 2.86
Crystal System:	Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4/mmm
X Ray Diffraction:	By Intensity(I/Io): 2.614(1), 2.84(0.9), 4.02(0.8),
Crystal Structure: Mouse drag1 - LMB Manipulate Structure drag2 - RMB Resize/Rotate Keyboard S - Stereo Pair on/off H - Help Screen I - Data Info A - Atoms On/Off P - Polyhedra On/Off B - Bonds On/Off Help on Above	Huminicki D M C , Hawthorne F C , The Canadian Mineralogist , 40 (2002) p.915-922, Refinement of the crystal structure of aminoffite
Physical Properties of Aminoffite
Cleavage:	[001] Indistinct
Color:	Colorless, Light yellow.
Density:	2.94
Diaphaniety:	Transparent
Fracture:	Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Hardness:	5.5 - Knife Blade
Luster:	Vitreous (Glassy)
Streak:	white
Optical Properties of Aminoffite
Gladstone-Dale:	CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= -0.028 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2245,KPDmeas= 0.2184,KC= 0.2184
Optical Data:	Uniaxial (-), e=1.637, w=1.647, bire=0.0100.
Calculated Properties of Aminoffite
Electron Density:	relectron=2.94 gm/cc note: rAminoffite =2.94 gm/cc.
Fermion Index	Fermion Index = 0.05333 Boson Index = 0.94667
Photoelectric:	PEAminoffite = 4.36 barns/electron U=PEAminoffite x relectron= 12.81 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Aminoffite is Not Radioactive
Aminoffite Classification
Dana Class:	57.1.1.1 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups
	(57.1)with [Si3O10] groups
	(57.1.1)Aminoffite and related species
	57.1.1.1 Aminoffite Ca3Be2Si3O10(OH)2 I 4/mmm 4/m 2/m 2/m
	57.1.1.2 Harstigite Ca6MnBe4(SiO4)2(Si2O7)2(OH)2 Pcmn 2/m 2/m 2/m
Strunz Class:	VIII/C.29-10 VIII - Silicates
	VIII/C - Sorosilicates with [Si3O10]8- groups
	VIII/C.29 - Aminoffite series
	VIII/C.29-10 Aminoffite Ca3Be2Si3O10(OH)2 I 4/mmm 4/m 2/m 2/m
Other Aminoffite Information
References:	NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:	Links to other databases for Aminoffite : 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 - WWW-MINCRYST 14 -École des Mines de Paris Search for Aminoffite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Aminoffite : 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 Aminoffite Mineral Data : Ask about Aminoffite 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 Aminoffite Specimen Label here : Aminoffite Ca3Be2Si3O10(OH)2 Dana No: 57.1.1.1 Strunz No: VIII/C.29-10 Locality:   Notes: