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Herderite

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Siegmund August Wolfgang von Herder
Formula:
CaBePO4(F,OH)
System:
Monoclinic
Colour:
Colourless, pale yellow, ...
Lustre:
Vitreous, Sub-Vitreous
Hardness:
5 - 5½
Name:
Named by Wilhelm Haidinger in 1828 in honor of Siegmund August Wolfgang von Herder (August 18, 1776 Gerrmany - January 29, 1838 Dresden, Germany), Mining official in Freiberg, Germany
Herderite-Hydroxylherderite Series. The fluorine-dominant analogue of Hydroxylherderite. Herderite is isotypic with Datolite.

Found usually as a pegmatite mineral formed during late-stage hydrothermal deposition.

Warning: Most specimens labelled "herderite" are in fact hydroxylherderite. True herderite probably does NOT occur at most of the localities listed here. Confirmed F-dominant specimens are presently known only from from Brazil (two locations), Mogok, Yichun, and Namibia.

Visit gemdat.org for gemological information about Herderite.

Classification of Herderite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Explanation of status:
Dominance of F in (OH,F) site doubtful in many occurrences described as herderite.
8.BA.10

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
A : With small and medium-sized cations
41.5.4.1

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
22.1.10

22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
mindat.org URL:
http://www.mindat.org/min-1876.html
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Type Occurrence of Herderite

Year of Discovery:
1828

Occurrences of Herderite

Geological Setting:
Complex granitic pegmatites

Physical Properties of Herderite

Vitreous, Sub-Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colourless, pale yellow, greenish-white; colourless in transmitted light.
Hardness (Mohs):
5 - 5½
Cleavage:
Imperfect/Fair
On {110}, interrupted.
Fracture:
Sub-Conchoidal
Density:
3.02 g/cm3 (Measured)    

Crystallography of Herderite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 4.81Å, b = 7.7Å, c = 9.82Å
β = 90.1°
Ratio:
a:b:c = 0.625 : 1 : 1.275
Unit Cell Volume:
V 363.70 ų (Calculated from Unit Cell)
Morphology:
Stout prismatic crystals [100] or [001]; thick tabular {001}. Commonly pseudo-orthorhombic in aspect, rarely monoclinic; pseudo-hexagonal [001] at times. Also occurs as botryoidal or spheroidal aggregates with a radial-fibrous structure.
Twinning:
On {100} or {001} as fishtail contact. Most crystals are twinned; however, some exhibit no outward signs of this morphology.

Crystallographic forms of Herderite

Crystal Atlas:
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Herderite no.19 - Goldschmidt (1913-1926)
Herderite no.20 - Goldschmidt (1913-1926)
3d models and HTML5 code kindly provided by www.smorf.nl.

Toggle
Edge Lines | Miller Indicies | Axes

Transparency
Opaque | Translucent | Transparent

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Along a-axis | Along b-axis | Along c-axis | Start rotation | Stop rotation
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Herderite

Type:
Biaxial (-)
RI values:
nα = 1.556 - 1.592 nβ = 1.578 - 1.610 nγ = 1.589 - 1.620
2V:
Calculated: 70°
Max Birefringence:
δ = 0.033
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v moderate

Chemical Properties of Herderite

Formula:
CaBePO4(F,OH)
Essential elements:
All elements listed in formula:
Common Impurities:
H,OH

Relationship of Herderite to other Species

Series:
Forms a series with Hydroxylherderite (see here)
8.BA.05VäyryneniteMn2+Be(PO4)(OH,F)
8.BA.10BergslagiteCaBeAsO4(OH)
8.BA.10HydroxylherderiteCaBe(PO4)(OH,F)
8.BA.15BabefphiteBaBePO4(F,OH)
22.1.1AmblygoniteLiAl(PO4)F
22.1.2LacroixiteNaAl(PO4)F
22.1.3NatrophosphateNa7(PO4)2F · 19H2O
22.1.5NacaphiteNa2Ca(PO4)F
22.1.6ArctiteNa2Ca4(PO4)3F
22.1.7NefedoviteNa5Ca4(PO4)4F
22.1.9FluorapatiteCa2Ca3(PO4)3F
22.1.11IsokiteCaMg(PO4)F
22.1.12PanasqueiraiteCaMg(PO4)(OH,F)
22.1.13BabefphiteBaBePO4(F,OH)
22.1.14FluelliteAl2(PO4)F2(OH) · 7H2O
22.1.15MinyuliteKAl2(PO4)2(OH,F) · 4H2O
22.1.16MoriniteNaCa2Al2(PO4)2(OH)F4 · 2H2O
22.1.17BøggilditeNa2Sr2Al2PO4F9
22.1.18FluorstrophiteSrCaSr3(PO4)3F
22.1.19ViitaniemiiteNa(Ca,Mn2+)Al(PO4)(F,OH)3
22.1.20VäyryneniteMn2+Be(PO4)(OH,F)
22.1.21MaxwelliteNaFe3+(AsO4)F
22.1.22Wagnerite(Mg,Fe2+)2(PO4)F
22.1.23Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
22.1.24Magniotriplite(Mg,Fe2+,Mn2+)2PO4F
22.1.25Zwieselite(Fe2+,Mn2+)2(PO4)F
22.1.26McauslaniteFe3Al2(PO4)3(PO3OH)F · 18H2O
22.1.27RichelliteCaFe23+(PO4)2(OH,F)2
22.1.28SvabiteCa5(AsO4)3F
22.1.29TilasiteCaMg(AsO4)F
22.1.30Johnbaumite-MCa5(AsO4)3OH
22.1.31DurangiteNaAl(AsO4)F

Other Names for Herderite

Name in Other Languages:
Simplified Chinese:磷铍钙石
Traditional Chinese:磷鈹鈣石

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Herderite

Reference List:
Haidinger (1828) Philosophical Magazine and Journal of Science: 4: 1.

Breithaupt, A. (1830) Ubersicht des Mineral-System’s. 8vo, Freiberg: 23 (as Allogonite).

Breithaupt, A. (1832) Vollständige Characteristik etc. 2nd. Ed., Dresden: 78 (as Allogonite).

Dana (1884) American Journal of Science: 27: 229.

Des Cloizeaux (1884) Bulletin de la Société française de Minéralogie: 7: 130.

Genth (1884) American Philosophical Society, Philadelphia: 21: 694.

Hidden (1884) American Journal of Science: 27: 135 (as Glucinite).

Mackintosh (1884) American Journal of Science: 27: 135.

Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 760.

Ford (1912) Zeitschrift für Kristallographie, Mineralogie und Petrographie, Leipzig: 50: 97.

Goldschmidt, V. (1918) Atlas der Krystallformen. 9 volumes, atlas, and text: vol. 4: 127.

Yatsevitch (1935) American Mineralogist: 20: 426.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 820-822.

American Mineralogist (1952): 37: 938.

Leavens, P.B., Dunn, P.J., Gaines, R.V. (1978): Compositional and refractive index variations of the herderite-hydroxylherderite series. American Mineralogist, 63, 913-917.

Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig, Vandall T. King, (1997), Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 832.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 242.

Harlow, G.E. & Hawthorne, F.C. (2008): Herderite from Mogok, Myanmar, and comparison with hydroxyl-herderite from Ehrenfriedersdorf, Germany. American Mineralogist, 93, 1545-1549.

Internet Links for Herderite

Specimens:
The following Herderite specimens are currently listed for sale on minfind.com.

Localities for Herderite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Austria
 
  • Upper Austria
    • Mühlviertel
      • Perg
        • St Georgen an der Gusen
Meixner, H. (1977): 406. Herderit, Columbit, Beryll, und blaue Apatit-xx im Pegmatit von Luftenberg bei Linz, Oberösterreich (vorläufige Mitteilung). P. 23 in MEIXNER, H. (1977): Neue Mineralfunde aus Österreich XXVII. Carinthia II, 167./87., 7-30.; Gerhard Brandstetter collection (analysed, but method of analysis not given); Brandstetter, G. & M. Reich (1998): Luftenberg - eine bedeutende Pegmatitmineralisation in Oberösterreich. OÖ. Geonachr. 13, 11-25; Brandstetter, G. & Reich, M. (1999): Luftenberg - eine bedeutende Pegmatitmineralisation in Oberösterreich. Mineralien-Welt 10 (3), 12-18.
Brazil
 
  • Minas Gerais
    • Doce valley
      • Divino das Laranjeiras
        • Linópolis
Frank and Wendy Melanson (Hawthorneden) specimens
      • Governador Valadares
        • Golconda district
Leavens, et al. (1978) Am Min.; Leavens, P. et al, Compositional and Refractive Index Variations of the Herderite-Hydroxyl-herderite Series, Am Min v63, p 913-917 (1978)
    • Jequitinhonha valley
Luis Menezes
  • Paraíba
Burma (Myanmar)
 
  • Mandalay Division
    • Pyin-Oo-Lwin District
American Mineralogist (2008) 93:1545-1549
        • Kyatpyin North
Ted Themelis (2008) Gems & mines of Mogok
        • Kyauk-Pyat-That
          • Sakangyi (Sakhan-gyi)
Praszkier, T. and Sacchi, M. (2012) Huge pocket from Sakangyi, Myamnar. Minerals, the collector's newspaper, #4, 1-7.
China
 
  • Fujian Province
    • Nanping Prefecture
      • Yanping District
        • Nanping pegmatite field (Xikeng pegmatite field)
Yueqing Yang, Wenying Wang, Yunxiang Ni, Chenghu Chen, and Jinghuang Zhu (1998): Geology of Fujian 17(2), 68-78
  • Jiangxi Province
    • Yichun Prefecture
      • Yuanzhou District
        • Yichun complex (Yashan batholith)
Xiaolong Huang, Rucheng Wang, Xiaoming Chen, Huan Hu, and Changshi Liu (2002): Canadian Mineralogist 40(4), 1047-1068; Xudong Che, Rucheng Wang, Huan Hu, Wenlan Zhang, and Xiaolong Huang (2007): Acta Petrologica Sinica 23(6), 1552-1560
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • South Bohemia Region
      • Nové Hrady
Welser, P., Zikeš, J.: Pegmatity od Šejb v Novohradských horách. Minerál, 2013, roč. 21, č. 5, s. 387-409.
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Žďár nad Sázavou
[Lapis 1994:6 p49-50]
Finland
 
  • Western and Inner Finland Region
    • Orivesi
      • Eräjärvi area
Sandström, F. & Lahti, S.I. (2009): Viitaniemipegmatiten i Eräjärvi, Orivesi, Finland. Litiofilen 26 (1): 11-38
Germany
 
  • Bavaria
    • Franconia
      • Fichtelgebirge
        • Tröstau
          • Leupoldsdorf
Lapis, 10 (7/8), 15-26+81
Lapis,10 (7/8), 40-48.
        • Weißenstadt
          • Großer Waldstein
Wittern: "Mineralfundorte in Deutschland", 2001
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 822; Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
          • Kirchenlamitz
Leavens, P., Dunn, P., and Gaines, R., 1978, Compositional and Refractive Index Variations of the Herderite-Hydroxylherderite Series, American Mineralogist, 63:913-917.
          • Rudolfstein
Wittern: "Mineralfundorte in Deutschland", 2001
  • Saxony
    • Erzgebirge
      • Ehrenfriedersdorf
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 822; Wittern: "Mineralfundorte in Deutschland", 2001
Italy
 
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Baveno
        • Oltrefiume
          • Mount Camoscio
American Mineralogist, 84(5-6), 782-789
Namibia
 
  • Erongo Region
Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern, 321 pp. (in English)
    • Karibib District
M Kampf collection
Pakistan
 
  • Gilgit-Baltistan (Northern Areas)
    • Baltistan
      • Skardu District
        • Braldu Valley
Polityka, J. (2004): What's New in Minerals. Springfield Show 2003 Mineralogical Record. 35 (2), 148-150
        • Haramosh Mts.
Dudley Blauwet, Bill Smith and Carol Smith (2004) Table of mineral localities of the northern areas of Pakistan and other selected sites. (in "Pakistan: Minerals, Mountains & Majesty", Lapis International, East Hampton, Connecticut); Dudley Blauwet, Bill Smith and Carol Smith (2004) Table of mineral localities of the northern areas of Pakistan and other selected sites. (in "Pakistan: Minerals, Mountains & Majesty", Lapis International, East Hampton, Connecticut)
Van King
No reference listed
TVM Specimen
    • Gilgit District
      • Hunza Valley
ExtraLapis No. 24 Pakistan & Afghanistan
Russia
 
  • Far-Eastern Region
    • Chukotskii Autonomous Okrug
      • Krasnoarmeiskii
Pavel M. Kartashov data
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
        • Kamensk-Ural'skii
N.A. Grigoriev, Zap. Vses. Mineral. Ob. , 1964, 93 (2), 156.
Spain
 
  • Castile and Leon
    • Zamora
      • Villar del Buey
        • Pinilla de Fermoselle
Am Min 90:1887-1899
Sweden
 
  • Södermanland
    • Norrö
Gustafson, Lars.(1989): Norrö glimmerbrott.Stuffen (Medlemsblad för Södertörn Amatörgeologiska Sällskap). Nr 39, nov 1989, 8-12; Gustafsson, Lars & Otter, Bertil (1991): Mineralförekomster i Stockholmstrakten.Del 2. STEIN 18(4),4-12
    • Utö
Gustafsson, Lars (1991): Eosphorit från Utö. Berg & Mineral(Medlemstidning för Stockholms Amatørgeologiska Sällskap). 1, nr 1, p. 18; Berg & Mineral nr 2, 1991, p. 11
UK
 
  • England
    • Cornwall
      • St Austell District
        • Lanlivery
[Golley & Williams, 1995, 32 - "Cornish Mineral Reference Manual"]
      • St Just District
        • St Just
          • Botallack
            • Botallack Mine
Kingsbury, A.W.G. (1958): Mineralogical Magazine 29, 815-817
    • Devon
      • Okehampton area (Northern Dartmoor)
http://www.mineralman.f9.co.uk/quarries/meldon.htm
USA
 
  • California
    • Riverside Co.
      • Cooper Canyon District
Leavens, et al., 1978, Compositional and Refractive Index Variations of the Herderite-Hydroxyl-herderite Series, American Mineralogist, v 63, p. 913-917.
    • San Diego Co.
      • Jacumba District
        • Jacumba
          • Tule Mountain (Mount Tule; Tulley Mountain)
Mineralogical Record 33(5):363-407
Mineralogical Record 33(5):363-407
      • Mesa Grande District
        • Gem Hill
Foord, E. E. (1977), Famous Mineral Localities: the Himalaya Dike System, Mesa Grande District, San Diego County, California. Mineralogical Record 8(6): p. 473.
      • Warner Springs District
        • Warner Springs
Kampf, A. R., et al (2003), Tourmaline Discovery at the Cryo-Genie Mine, San Diego County, California, Rocks & Minerals 78(3), 156-168.
  • Connecticut
    • Middlesex Co.
      • East Hampton (Chatham)
        • Cobalt
Januzzi (1994); Schooner (1958)
  • Maine
    • Oxford Co.
      • Buckfield
Leavens, P., Dunn, P., and Gaines, R., 1978, Compositional and Refractive Index Variations of the herderite-hydroxyl-herderite series, American Mineralogist, v. 63, p. 913-917.
      • Greenwood
        • Uncle Tom Mountain
Mineral News (1998) 14:8 pp2,9
      • Newry
Leavens, P. et al, Compositional and Refractive Index Variations of the Herderite-Hydroxyl-herderite Series, Am Min v63, p 913-917 (1978)
  • New Hampshire
    • Grafton Co.
      • Groton
Leavens, P., Dunn, P., and Gaines, R., 1978, Compositional and Refractive Index Variations of the herderite-hydroxyl-herderite series, American Mineralogist, v. 63, p. 913-917.
  • North Carolina
    • Gaston Co.
      • Bessemer City
No reference listed
Mineral and/or Locality  
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