Herderite Mineral Data +

AA Mineral Specimens

General Herderite Information
Chemical Formula:	CaBe(PO4)F
Composition:	Molecular Weight = 163.06 gm
	Calcium     24.58 %  Ca   34.39 % CaO
	Beryllium    5.53 %  Be   15.34 % BeO
	Phosphorus  19.00 %  P    43.53 % P2O5
	Oxygen      39.25 %  O
	Fluorine    11.65 %  F    11.65 % F
	-   %  F    -4.91 % -O=F2
	______        ______
	100.00 %      100.00 % = TOTAL OXIDE
Empirical Formula:	CaBe(PO4)F
Environment:	Forms a series with hydroxylherderite.
IMA Status:	Valid Species (Pre-IMA) 1828
Locality:	Ehrenfriedersdorf, Saxony, Germay. Link to MinDat.org Location Data.
Name Origin:	Named for Siegmund August Wolfgang von Herder (1776-1838), mining official in Freiberg, Saxony, Germany.
Synonym:	ICSD 20573
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Herderite Image
Images:	Herderite Comments: Partially transparent herderite crystal with minor white albite. Location: Alto do Corrego Frio, Linopolis, Minas Gerais, Brazil. Scale: 3.1x2.7x2.9 cm. © Fabre Minerals
Herderite Crystallography
Axial Ratios:	a:b:c =1.2777:1:0.627
Cell Dimensions:	a = 9.789, b = 7.661, c = 4.804, Z = 4; beta = 90.02° V = 360.27 Den(Calc)= 3.01
Crystal System:	Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
X Ray Diffraction:	By Intensity(I/Io): 3.14(1), 2.86(0.8), 2.2(0.7),
Forms: Mouse Dbl Clk - Start-Stop Rotation RMB - Cycle Display Modes Drag1 - Manipulate Crystal Drag2 - Resize Keyboard S - Stereo I - Indicies <space> - Start-Stop Rotation F - Fit to Screen M - Menu Help on Above	Forms: [ 1 1 0] [ 1 1 1] [ 0 1 1] Warning: this large pop-up is very compute intensive and may not work well with some computers.
Physical Properties of Herderite
Cleavage:	[110] Indistinct
Color:	White, Yellowish white, Greenish white.
Density:	3
Diaphaniety:	Transparent to Translucent
Fracture:	Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Hardness:	5 - Apatite
Luminescence:	Non-fluorescent.
Luster:	Vitreous (Glassy)
Streak:	white
Optical Properties of Herderite
Gladstone-Dale:	CI meas= -0.043 (Good) - where the CI = (1-KPDmeas/KC) CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2019,KPDmeas= 0.2026,KC= 0.1942
Optical Data:	Biaxial (-), a=1.591-1.592, b=1.611-1.612, g=1.619-1.621, bire=0.0280-0.0290
Calculated Properties of Herderite
Electron Density:	relectron=2.95 gm/cc note: rHerderite =3.01 gm/cc.
Fermion Index	Fermion Index = 0.05578 Boson Index = 0.94422
Photoelectric:	PEHerderite = 4.08 barns/electron U=PEHerderite x relectron= 12.04 barns/cc.
Radioactivity:	GRapi = 0 (Gamma Ray American Petroleum Institute Units) Herderite is Not Radioactive
Herderite Classification
Dana Class:	41.5.4.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
	(41.5)where (A B)2 (XO4) Zq
	(41.5.4)Dana Group
	41.5.4.1 Herderite CaBe(PO4)F P 21/a 2/m
	41.5.4.2 Hydroxylherderite CaBe(PO4)(OH) P 21/a 2/m
	41.5.4.3 Vayrynenite MnBe(PO4)(OH,F) P 21/a 2/m
	41.5.4.4 Bergslagite CaBe(AsO4)(OH) P 21/c 2/m
Strunz Class:	VII/B.01-10 VII - Phosphates, Arsenates and Vanadates
	VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH, cations of very small size: Li, Be
	VII/B.01 - Herderite - Babefphite series
	VII/B.01-10 Herderite CaBe(PO4)F P 21/a 2/m
	VII/B.01-20 Hydroxylherderite CaBe(PO4)(OH) P 21/a 2/m
	VII/B.01-30 Bergslagite CaBe(AsO4)(OH) P 21/c 2/m
	VII/B.01-50 Vayrynenite MnBe(PO4)(OH,F) P 21/a 2/m
	VII/B.01-60 Babefphite BaBe(PO4)(F,O) I 41/amd 4/m 2/m 2/m
Other Herderite Information
References:	PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
See Also:	Links to other databases for Herderite : 1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 -Athena 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - Scandinavian mineral gallery 14 - WWW-MINCRYST 15 -École des Mines de Paris Search for Herderite using:   Web webmineral.com [ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO] Visit our Advertisers for Herderite : 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 Herderite Mineral Data : Ask about Herderite 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 Herderite Specimen Label here : Herderite CaBe(PO4)F Dana No: 41.5.4.1 Strunz No: VII/B.01-10 Locality:   Notes: