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Herderite

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Formula:
CaBePO
 
4
(F,OH)
System:MonoclinicColour:Colourless, pale yellow, ...
Lustre:Vitreous, Sub-VitreousHardness: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. Currently in public beta-test.

Classification of Herderite

IMA status: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.
Strunz 8th edition ID:7/B.01-10
Nickel-Strunz 10th (pending) edition ID:8.BA.10

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

41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
Hey's CIM Ref.:22.1.10

22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
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Type Occurrence of Herderite

Type Locality:Sauberg Mine, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
Year of Discovery:1828

Occurrences of Herderite

Geological Setting:Complex granitic pegmatites

Physical Properties of Herderite

Lustre: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 (measured):3.02 g/cm3

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.
Crystal Atlas:
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Herderite no.19 - Goldschmidt (1913-1926)
Herderite no.20 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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X-Ray Powder Diffraction:
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Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data:
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°
Maximum Birefringence:δ = 0.033

Chart 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:
CaBePO
 
4
(F,OH)
Simplified for copy/paste:CaBePO4(F,OH)
Essential elements:Be, Ca, F, O, P
All elements listed in formula:Be, Ca, F, H, O, P
Common Impurities:H,OH

Relationship of Herderite to other Species

Series:Forms a series with Hydroxylherderite (see here)
Related Minerals - Nickel-Strunz Grouping):

- +
8.BA.05Väyrynenite
Mn
2+
 
Be(PO
 
4
)(OH,F)
8.BA.10Bergslagite
CaBeAsO
 
4
(OH)
8.BA.10Hydroxylherderite
CaBe(PO
 
4
)(OH,F)
8.BA.15Babefphite
BaBePO
 
4
(F,OH)
Related Minerals - Hey's Index Grouping:

- +
22.1.1Amblygonite
LiAl(PO
 
4
)F
22.1.2Lacroixite
NaAl(PO
 
4
)F
22.1.3Natrophosphate
Na
 
7
(PO
 
4
)
 
2
F · 19H
 
2
O
22.1.5Nacaphite
Na
 
2
Ca(PO
 
4
)F
22.1.6Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F
22.1.7Nefedovite
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
F
22.1.9Fluorapatite
Ca
 
5
(PO
 
4
)
 
3
F
22.1.11Isokite
CaMg(PO
 
4
)F
22.1.12Panasqueiraite
CaMg(PO
 
4
)(OH,F)
22.1.13Babefphite
BaBePO
 
4
(F,OH)
22.1.14Fluellite
Al
 
2
(PO
 
4
)F
 
2
(OH) · 7H
 
2
O
22.1.15Minyulite
KAl
 
2
(PO
 
4
)
 
2
(OH,F) · 4H
 
2
O
22.1.16Morinite
NaCa
 
2
Al
 
2
(PO
 
4
)
 
2
(OH)F
 
4
· 2H
 
2
O
22.1.17Bøggildite
Na
 
2
Sr
 
2
Al
 
2
PO
 
4
F
 
9
22.1.18Fluorstrophite
SrCaSr
 
3
(PO
 
4
)
 
3
F
22.1.19Viitaniemiite
Na(Ca,Mn
2+
 
)Al(PO
 
4
)(F,OH)
 
3
22.1.20Väyrynenite
Mn
2+
 
Be(PO
 
4
)(OH,F)
22.1.21Maxwellite
NaFe
3+
 
(AsO
 
4
)F
22.1.22Wagnerite
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)F
22.1.23Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
(PO
 
4
)(F,OH)
22.1.24Magniotriplite
(Mg,Fe
2+
 
,Mn
2+
 
)
 
2
PO
 
4
F
22.1.25Zwieselite
(Fe
2+
 
,Mn
2+
 
)
 
2
(PO
 
4
)F
22.1.26Mcauslanite
Fe
 
3
Al
 
2
(PO
 
4
)
 
3
(PO
 
3
OH)F · 18H
 
2
O
22.1.27Richellite
CaFe
3+
2
(PO
 
4
)
 
2
(OH,F)
 
2
22.1.28Svabite
Ca
 
5
(AsO
 
4
)
 
3
F
22.1.29Tilasite
CaMg(AsO
 
4
)F
22.1.30Johnbaumite-M
Ca
 
5
(AsO
 
4
)
 
3
OH
22.1.31Durangite
NaAl(AsO
 
4
)F

Other Names for Herderite

Synonyms:
AllogoniteFluor-herderiteGlucinite
Other Languages:
German:Allogonit
Glucinit
Herderit
Russian:Гердерит
Simplified Chinese:磷铍钙石
Spanish:Allogonita
Glucinita
Herderita
Traditional Chinese:磷鈹鈣石

Other Information

Health Warning: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.

Mindat.org articles about Herderite

Article entries:
The Blue Chihuahua Mine (Where art thou?) by Al Ordway 2003Scott L. Ritchie

Internet Links for Herderite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Herderite details from Handbook of Mineralogy (PDF)
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  • Specimens:The following Herderite specimens are currently listed for sale on minfind.com.

    Localities for Herderite

    The 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. ? 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
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