Herderite Mineral Data (original) (raw)
General Herderite Information
CaBe(PO4)F
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
______ ______
100.00 % 100.00 % = TOTAL OXIDE
CaBe(PO4)F
Forms a series with hydroxylherderite.
Valid Species (Pre-IMA) 1828
Ehrenfriedersdorf, Saxony, Germay. Link to MinDat.org Location Data.
Named for Siegmund August Wolfgang von Herder (1776-1838), mining official in Freiberg, Saxony, Germany.
ICSD 20573
PDF 6-338
Herderite Image
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 |
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Herderite Crystallography
a:b:c =1.2777:1:0.627
a = 9.789, b = 7.661, c = 4.804, Z = 4; beta = 90.02° V = 360.27 Den(Calc)= 3.01
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/a
By Intensity(I/Io): 3.14(1), 2.86(0.8), 2.2(0.7),
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| | 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. | | --------------------------------------------------------------------------------------------------------------------------------------------------- |
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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
{110} Indistinct
White, Yellowish white, Greenish white.
3
Transparent to Translucent
Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
5 - Apatite
Non-fluorescent.
Vitreous (Glassy)
white
Optical Properties of Herderite
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
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
Bulk Density (Electron Density)=2.95 gm/cc
note: Specific Gravity of Herderite =3.01 gm/cc.
Fermion Index = 0.05
Boson Index = 0.95
PEHerderite = 4.08 barns/electron
U=PEHerderite x rElectron Density= 12.04 barns/cc.
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Herderite is Not Radioactive
Herderite Classification
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
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
PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
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 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - Scandinavian mineral gallery
17 - WWW-MINCRYST
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Print or Cut-and-Paste your Herderite Specimen Label here :
Herderite
CaBe(PO4)F
Dana No: 41.05.04.01 Strunz No: 08.BA.10
Locality:
Notes: