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Herderite

Big Photo

Golconda District, Governador Valadares, Doce valley, Minas Gerais, Southeast Region, Brazil
© 2001 John H. Betts

Show Herderite Photos (39)
Formula:
CaBe[(F,OH)|PO
 
4
]
System:MonoclinicColour:Colourless, pale yellow, ...
Lustre:Vitreous, Sub-VitreousHardness:5 - 5½
Name:For Siegmund August Wolfgang von Herder (1776-1838), 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. Only F dominant specimen from Brazil.

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

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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: Peaks:
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:
CaBe[(F,OH)|PO
 
4
]
Essential elements:Be, Ca, H, 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[(OH,F)|PO
 
4
]
8.BA.10Bergslagite
CaBe[OH|AsO
 
4
]
8.BA.10Hydroxylherderite
CaBe[(OH,F)|PO
 
4
]
8.BA.15Babefphite
BaBe[(F,OH)|PO
 
4
]
Related Minerals - Hey's Index Grouping:
22.1.1Amblygonite
(Li,Na)Al[(F,OH)|PO
 
4
]
22.1.2Lacroixite
NaAl[F|PO
 
4
]
22.1.3Natrophosphate
Na
 
7
(PO
 
4
)
 
2
F·19H
 
2
O
22.1.5Nacaphite
Na
 
2
Ca[F|PO
 
4
]
22.1.6Arctite
Na
 
2
Ca
 
4
(PO
 
4
)
 
3
F
22.1.7Nefedovite
Na
 
5
Ca
 
4
(PO
 
4
)
 
4
F
22.1.9Apatite-(CaF)
Ca
 
5
[F|(PO
 
4
)
 
3
]
22.1.11Isokite
CaMg[F|PO
 
4
]
22.1.12Panasqueiraite
CaMg[(OH,F)|PO
 
4
]
22.1.13Babefphite
BaBe[(F,OH)|PO
 
4
]
22.1.14Fluellite
Al
 
2
[F
 
2
|OH|PO
 
4
] · 7H
 
2
O
22.1.15Minyulite
KAl
 
2
[(OH,F)|(PO
 
4
)
 
2
] · 4H
 
2
O
22.1.16Morinite
Na
 
2
Ca
 
4
Al
 
4
[(F,OH)
 
5
|(PO
 
4
)
 
2
]
 
2
 · 3H
 
2
O
22.1.17Bøggildite
Na
 
2
Sr
 
2
Al
 
2
PO
 
4
F
 
9
22.1.18Apatite-(SrOH)
(Sr,Ca)
 
5
(PO
 
4
)
 
3
(OH,F)
22.1.19Viitaniemiite
Na(Ca,Mn
2+
 
)Al[(F,OH)
 
3
|PO
 
4
]
22.1.20Väyrynenite
Mn
2+
 
Be[(OH,F)|PO
 
4
]
22.1.21Maxwellite
NaFe
3+
 
[F|AsO
 
4
]
22.1.22Wagnerite
(Mg,Fe
2+
 
)
 
2
[F|PO
 
4
]
22.1.23Triplite
(Mn
2+
 
,Fe
2+
 
)
 
2
[(F,OH)|PO
 
4
]
22.1.24Magniotriplite
(Mg,Fe
2+
 
,Mn
2+
 
)
 
2
[F|PO
 
4
]
22.1.25Zwieselite
(Fe
2+
 
,Mn
2+
 
)
 
2
[F|PO
 
4
]
22.1.26Mcauslanite
HFe
2+
3
Al
 
2
[F|(PO
 
4
)
 
4
] · 18H
 
2
O
22.1.27Richellite
Ca
 
3
Fe
3+
10
[(OH,F)
 
3
|(PO
 
4
)
 
2
]
 
4
 · nH
 
2
O (not confirmed)
22.1.28Svabite
Ca
 
5
[(F,Cl,OH)|(AsO
 
4
)
 
3
]
22.1.29Tilasite
CaMg[F|AsO
 
4
]
22.1.30Fermorite
(Ca,Sr)
 
5
(AsO
 
4
,PO
 
4
)
 
3
(OH)
22.1.31Durangite
NaAl[F|AsO
 
4
]

Other Names for Herderite

Synonyms:
AllogoniteFluor-herderiteGlucinite
German names:
AllogonitAllogonitGlucinitHerderit
Russian names:
Гердерит
Spanish names:
AllogonitaGlucinitaHerderita

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.

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.

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

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.

Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig (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.

Internet Links for Herderite

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  • Raman and XRD data at RRUFF project
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  • Herderite details from Handbook of Mineralogy (PDF)
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    Localities for Herderite

    Hide Locality List
    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.
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    (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
      • Linz
        • St Georgen
    		G Brandstetter collection (Analysis: S Möckel)
    Brazil
     
    • Northeast Region
      • Paraíba
    		[www.johnbetts-fineminerals.com]
    • Southeast Region
      • Minas Gerais
        • Doce valley
          • Divino das Laranjeiras
            • Linópolis
    Frank and Wendy Melanson (Hawthorneden) specimens
          • Galiléia
            • Laranjeiras
    		[MinRec 12:69]
          • Governador Valadares
    		[www.johnbetts-fineminerals.com]
    Czech Republic
     
    • Moravia (Mähren; Maehren)
      • Vysočina Region
        • Žďár nad Sázavou
    		[Lapis 1994:6 p49-50]
    Finland
     
    • Etelä-Suomen Lääni
      • Orivesi
        • Eräjärvi area
    		No reference listed
    Germany
     
    • Bavaria
      • Franconia
        • Fichtelgebirge
          • Tröstau
            • Leupoldsdorf
    		Lapis, 10 (7/8), 15-26+81
    Lapis,10 (7/8), 40-48.
          • Weißenstadt
            • Großer Waldstein Mt.
    		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
    		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
            • Rudolfstein Mt.
    		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
      • Karibib District
    		M Kampf collection
    Pakistan
     
    • Northern Areas
      • Baltistan
        • Skardu District
          • Braldu Valley
    		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)
          • 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)
    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)
    No reference listed
      • Gilgit District
        • Hunza Valley
    		ExtraLapis No. 24 Pakistan & Afghanistan
    Russia
     
    • Urals Region
      • Middle Urals
        • Ekaterinburgskaya (Sverdlovskaya) Oblast'
          • Kamensk-Ural'skii
    		N.A. Grigoriev, Zap. Vses. Mineral. Ob. , 1964, 93 (2), 156.
    Spain
     
    • Castile and Leon
      • Zamora
    		Am Min 90:1887-1899
    Sweden
     
    • Södermanland
      • Haninge
    		Gustafsson, Lars & Otter, Bertil (1991): Mineralförekomster i Stockholmstrakten.Del 2. STEIN 18(4),4-12
    UK
     
    • England
      • Cornwall
        • St Austell District
          • Luxulyan Area (Luxulian Area)
    		[Golley & Williams, 1995, 32 - "Cornish Mineral Reference Manual"]
        • St Just District
          • Botallack - Pendeen Area
            • Botallack
              • Botallack Mine
    		[Golley & Williams, 1995, 32 - "Cornish Mineral Reference Manual"]
      • Devon
        • Okehampton area (Northern Dartmoor)
    		http://www.mineralman.f9.co.uk/quarries/meldon.htm
    USA
     
    • California
      • Riverside Co.
    		Rocks & Min.:59:82.
      • San Diego Co.
        • Jacumba District
          • Mt. Tule
    		Mineralogical Record 33(5):363-407
    Mineralogical Record 33(5):363-407
        • Warner Springs District
    		Rocks & Minerals, May-June 2003
    • Connecticut
      • Middlesex Co.
        • East Hampton
    		Januzzi, 1976. Mineral Localities of CT and Southeastern NY State
    • 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.
    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.
    • 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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