Atelestite Mineral Data +

John Betts Fine Minerals

General Atelestite Information
Chemical Formula:	Bi8(AsO4)3(OH)5O5
Composition:	Molecular Weight = 2,253.63 gm
	Bismuth   74.18 %  Bi   82.70 % Bi2O3
	Arsenic    9.97 %  As   15.30 % As2O5
	Hydrogen   0.22 %  H     2.00 % H2O
	Oxygen    15.62 %  O
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	Bi8(AsO4)3(OH)5O5
Environment:	As a rare secondary mineral in the oxidized zone of bismuth- and arsenic-bearing mineral deposits.
IMA Status:	Valid Species (Pre-IMA) 1832
Locality:	In Germany, in Saxony, at the Neuhilfe, the Weisser Hirsch, and the Junge Kalbe mines, Neustadtel-Schneeberg; from Gadernheim, near Bensheim, Hesse; and the Neubulach and the Schmiedes Link to MinDat.org Location Data.
Name Origin:	Derivation not explicitly stated. Probably from the Greek for "incomplete," as the composition was undetermined when the mineral was first described.
Synonym:	ICSD 70112
	PDF 15-735
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Atelestite Crystallography
Axial Ratios:	a:b:c =1.4663:1:0.9407
Cell Dimensions:	a = 10.88, b = 7.42, c = 6.98, Z = 1; beta = 107.213° V = 538.25 Den(Calc)= 6.95
Crystal System:	Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
X Ray Diffraction:	By Intensity(I/Io): 3.239(1), 3.116(0.4), 2.725(0.3),
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Physical Properties of Atelestite
Cleavage:	[???] Indistinct
Color:	Green, Light yellow, Black.
Density:	6.82
Diaphaniety:	Transparent to Translucent
Hardness:	4.5-5 - Near Apatite
Luster:	Adamantine - Resinous
Streak:	white
Optical Properties of Atelestite
Gladstone-Dale:	CI meas= -0.073 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.053 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1664,KPDmeas= 0.1696,KC= 0.1581
Optical Data:	Biaxial (+), a=2.14, b=2.15, g=2.18, bire=0.0400, 2V(Calc)=62, 2V(Meas)=44.
Calculated Properties of Atelestite
Electron Density:	relectron=5.82 gm/cc note: rAtelestite =6.95 gm/cc.
Fermion Index	Fermion Index = 0.00007 Boson Index = 0.99993
Photoelectric:	PEAtelestite =1,432.77 barns/electron U=PEAtelestite x relectron=8,342.18 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Atelestite is Not Radioactive
Atelestite Classification
Dana Class:	41.11.5.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
	(41.11)with miscellaneous formulae
	(41.11.5)Dana Group
	41.11.5.1 Atelestite Bi8(AsO4)3(OH)5O5 P 21/a 2/m
Strunz Class:	VII/B.30-02 VII - Phosphates, Arsenates and Vanadates
	VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb
	VII/B.30 - Petitjeanite - Kuznetsovite series
	VII/B.30-01 Smrkovecite! Bi2O(OH)(PO4) P 21/c 2/m
	VII/B.30-02 Atelestite Bi8(AsO4)3(OH)5O5 P 21/a 2/m
	VII/B.30-03 Hechtsbergite! Bi2O(OH)(VO4) P 21/c 2/m
	VII/B.30-05 Petitjeanite Bi3(PO4)2O(OH) P1 1
	VII/B.30-10 Preisingerite Bi3(AsO4)2O(OH) P1 1
	VII/B.30-20 Schumacherite Bi3[(V,As,P)O4]2O(OH) P1 1
	VII/B.30-30 Kuznetsovite! Hg3Cl(AsO4) P 213 2 3
Other Atelestite Information
References:	NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:	Links to other databases for Atelestite : 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 - WWW-MINCRYST 13 -École des Mines de Paris Search for Atelestite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Atelestite : 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 Atelestite Mineral Data : Ask about Atelestite 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 Atelestite Specimen Label here : Atelestite Bi8(AsO4)3(OH)5O5 Dana No: 41.11.5.1 Strunz No: VII/B.30-02 Locality:   Notes: