Herderite Mineral Data

Herderite Mineral Data
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General Herderite Information

Help on Chemical Formula: Chemical Formula: CaBe(PO4)F
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: CaBe(PO4)F
Help on Environment: Environment: Forms a series with hydroxylherderite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1828
Help on Locality: Locality: Ehrenfriedersdorf, Saxony, Germay. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Siegmund August Wolfgang von Herder (1776-1838), mining official in Freiberg, Saxony, Germany.
Help on Name Pronunciation: Name Pronunciation: Herderite + Pronunciation Say HERDERITE
Help on Synonym: Synonym: ICSD 20573
  PDF 6-338
 

Herderite Image

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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
Help on Axial Ratios: Axial Ratios: a:b:c =1.2777:1:0.627
Help on Cell Dimensions: Cell Dimensions: a = 9.789, b = 7.661, c = 4.804, Z = 4; beta = 90.02° V = 360.27 Den(Calc)= 3.01
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.14(1), 2.86(0.8), 2.2(0.7),
Help on Forms: Forms:

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Forms: ( 1 1 0) ( 1 1 1) ( 0 1 1)

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Click Here for Large Herderite Structure Window Crystal Structure:

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Harlow G E , Hawthorne F C , American Mineralogist , 93 (2008) p.1545-1549, Herderite from Mogok, Myanmar, and comparison with hydroxyl-herderite from, Ehrenfriedersdorf, Germany, Locality: Sauberg mine, Morgenrother Zug, Ehrenfriedersdorf, Germany, Note: 20517, Note: Occupancies derived from X-ray diffraction analysis

 

Physical Properties of Herderite

Help on Cleavage: Cleavage: {110} Indistinct
Help on Color: Color: White, Yellowish white, Greenish white.
Help on Density: Density: 3
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Hardness: Hardness: 5 - Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Herderite

Help on Gladstone-Dale: 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
Ncalc = 1.58
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.95 gm/cc
note: Specific Gravity of Herderite =3.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEHerderite = 4.08 barns/electron
U=PEHerderite x rElectron Density= 12.04 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Herderite is Not Radioactive
 

Herderite Classification
Help on Dana Class: Dana Class: 41.05.04.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.05)where (A B)2 (XO4) Zq
  (41.05.04)Herderite Group
 
41.05.04.01 Herderite CaBe(PO4)F P 21/a 2/m
 
41.05.04.02 Hydroxylherderite CaBe(PO4)(OH) P 21/a 2/m
 
41.05.04.03 Vayrynenite MnBe(PO4)(OH,F) P 21/a 2/m
 
41.05.04.04 Bergslagite CaBe(AsO4)(OH) P 21/c 2/m
Help on Strunz Class: Strunz Class: 08.BA.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BA -With small and medium-sized cations
 
08.BA.10 Bergslagite CaBe(AsO4)(OH) P 21/c 2/m
 
08.BA.10 Herderite CaBe(PO4)F P 21/a 2/m
 
08.BA.10 Hydroxylherderite CaBe(PO4)(OH) P 21/a 2/m
 

Other Herderite Information
Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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 - Ecole des Mines de Paris
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - MinMax(Deutsch)
12 - MinMax(English)
13 - Mineralienatlas (Deutsch)
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - WWW-MINCRYST

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Herderite

CaBe(PO4)F
Dana No: 41.05.04.01 Strunz No: 08.BA.10
Locality:

 

Notes: