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Roscherite

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Formula:
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
System:MonoclinicColour:Brown, red, orange, ...
Hardness:
Member of:Roscherite Group
Name:Named in 1914 by František Slavik in honor of Mr. Woldemar Roscher [1866-1934], a pharmacist and mineral collector of Ehrenfriedersdorf, Saxony, Germany. Redefined as a beryllium-bearing mineral in 1958 by Marie Louise Lindberg.
Dimorph of:Footemineite
Isostructural with:Greifensteinite, Zanazziite


Roscherite Group.

Occurs in cavities in granite or in complex zoned granitic pegmatites. Many roscherite localities are actually greifensteinite localities.

Classification of Roscherite

IMA status:Approved
Strunz 8th edition ID:7/D.01-60
Nickel-Strunz 10th (pending) edition ID:8.DA.10

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations
Dana 8th edition ID:42.7.7.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
Hey's CIM Ref.:19.3.12

19 : Phosphates
3 : Phosphates of Be and Mg
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Type Occurrence of Roscherite

Type Locality:Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
Place of Conservation of Type Material:Charles University, Prague, Czech Republic: #6472. The Staatliche Naturhistorische Sammlungen Dresden
Natural History Museum, London, England: #1914,1381. U.S. National Museum of Natural History, Washington, D.C., USA: R6219.
Year of Discovery:1914
Geological Setting of type material:Granite
Associated Minerals at type locality:
TourmalineMoriniteLacroixiteEosphoriteApatite

Occurrences of Roscherite

Geological Setting:Miarolitic cavities in granites, complex zoned granitic pegmatites

Physical Properties of Roscherite

Lustre:Sub-Vitreous, Resinous, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Brown, red, orange, greenish gray; yellowish green to brown in transmitted light
Comment:May exhibit abnormal interference colours. Distinctly green roscherite may be iro-rich and be greifensteinite
Streak:White
Hardness (Mohs):
Tenacity:Brittle
Cleavage:Distinct/Good
n {001}, good; on {010}, distinct.
Fracture:Splintery
Comment:May be slintery due to radial fibrous aggregates
Density (measured):2.90 - 2.97 g/cm3
Density (calculated):2.77(8) g/cm3

Crystallography of Roscherite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m
Space Group Setting:C2/m
Cell Parameters:a = 15.88Å, b = 11.90Å, c = 6.62Å
β = 94.7°
Ratio:a:b:c = 1.334 : 1 : 0.556
Unit Cell Volume:V 1,246.79 ų (Calculated from Unit Cell)
Z:4
Morphology:Short prismatic [001], with an eight-or six-sided cross section; also or flattened on {100} or {010} thin tabular, and elongated [010], with forms {010}, {110}, and {111}. Spherical to botryoidal aggregates and crusts with an internally firbous structure; pulverulent massive.
Comment:Monoclinic Space Group: C2/c, β = 94°42'. May be triclinic with space group C-1, with a = 15.921, b = 11.965, c = 6.741. α = 91°04', β = 94°21', γ = 89°59.5'.
X-Ray Powder Diffraction:
d-spacingIntensity
9.51 (90)
5.95 (100)
4.84 (40)
3.17 (80)
3.08 (2b)
2.788 (60)
2.644 (40)
Comments:Similar to zanazziite

Optical Data of Roscherite

Type:Biaxial (-)
RI values: nα = 1.624 - 1.628 nβ = 1.639 - 1.644 nγ = 1.643 - 1.650
Birefringence:0.020
Maximum Birefringence:δ = 0.019 - 0.022

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v very strong, crossed dispersion
Optical Extinction:X=b, Y^c - -15°to 24°
Pleochroism:Visible
Comments:X = Yellow to olive green
Y = Yellow-brown, greenish brown
Z = Chestnut brown
Comments:2V measured: large.

Chemical Properties of Roscherite

Formula:
Ca
 
2
Mn
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Simplified for copy/paste:Ca2Mn2+5Be4(PO4)6(OH)4·6H2O
Essential elements:Be, Ca, H, Mn, O, P
All elements listed in formula:Be, Ca, H, Mn, O, P

Relationship of Roscherite to other Species

Member of:Roscherite Group
Other Members of Group:

- +
Atencioite
Ca
 
2
Fe
2+
3
Mg
 
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Footemineite
Ca
 
2
Mn
2+
 
Mn
2+
2
Mn
2+
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Greifensteinite
Ca
 
2
Fe
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Guimarãesite
Ca
 
2
(Zn,Mg,Fe
2+
 
)
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Okruschite
Ca
 
2
Mn
2+
5
Be
 
4
(AsO
 
4
)
 
6
(OH)
 
4
·6H
 
2
O
Ruifrancoite
Ca
 
2
 
2
(Fe
3+
 
,Mn
2+
 
,Mg)
 
4
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
(OH,H
 
2
O)
 
2
· 4H
 
2
O
Zanazziite
Ca
 
2
Mg
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
Common Associates:
QuartzMuscoviteMoraesiteHydroxylherderiteFluorapatite
BerylloniteBerylAlbite
Related Minerals - Nickel-Strunz Grouping):

- +
8.DA.05Bearsite
Be
 
2
(AsO
 
4
)(OH) · 4H
 
2
O
8.DA.05Moraesite
Be
 
2
(PO
 
4
)(OH) · 4H
 
2
O
8.DA.10Zanazziite
Ca
 
2
Mg
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Greifensteinite
Ca
 
2
Fe
2+
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Atencioite
Ca
 
2
Fe
2+
3
Mg
 
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Ruifrancoite
Ca
 
2
 
2
(Fe
3+
 
,Mn
2+
 
,Mg)
 
4
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
(OH,H
 
2
O)
 
2
· 4H
 
2
O
8.DA.10Guimarãesite
Ca
 
2
(Zn,Mg,Fe
2+
 
)
 
5
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.10Footemineite
Ca
 
2
Mn
2+
 
Mn
2+
2
Mn
2+
2
Be
 
4
(PO
 
4
)
 
6
(OH)
 
4
· 6H
 
2
O
8.DA.15Uralolite
Ca
 
2
Be
 
4
(PO
 
4
)
 
3
(OH)
 
3
· 5H
 
2
O
8.DA.20Weinebeneite
CaBe
 
3
(PO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
8.DA.25Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
(PO
 
4
)
 
6
(OH)
 
2
· H
 
2
O
8.DA.30Veszelyite
(Cu,Zn)
 
2
Zn(PO
 
4
)
 
2
· 2H
 
2
O
8.DA.35Kipushite
(Cu,Zn)
 
5
Zn(PO
 
4
)
 
2
(OH)
 
6
· H
 
2
O
8.DA.35Philipsburgite
(Cu,Zn)
 
6
(AsO
 
4
,PO
 
4
)
 
2
(OH)
 
6
· H
 
2
O
8.DA.40Spencerite
Zn
 
4
(PO
 
4
)
 
2
(OH)
 
2
· 3H
 
2
O
8.DA.45Glucine
CaBe
 
4
(PO
 
4
)
 
2
(OH)
 
4
· 0.5H
 
2
O
8.DA.50Ianbruceite
[Zn
 
2
(OH)(H
 
2
O)(AsO
 
4
)](H
 
2
O)
 
2
Related Minerals - Hey's Index Grouping:

- +
19.3.1Moraesite
Be
 
2
(PO
 
4
)(OH) · 4H
 
2
O
19.3.2Beryllonite
NaBePO
 
4
19.3.3Hurlbutite
CaBe
 
2
(PO
 
4
)
 
2
19.3.4Hydroxylherderite
CaBe(PO
 
4
)(OH,F)
19.3.5Glucine
CaBe
 
4
(PO
 
4
)
 
2
(OH)
 
4
· 0.5H
 
2
O
19.3.6Fransoletite
Ca
 
3
Be
 
2
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
· 4H
 
2
O
19.3.7Uralolite
Ca
 
2
Be
 
4
(PO
 
4
)
 
3
(OH)
 
3
· 5H
 
2
O
19.3.9Pahasapaite
Li
 
8
(Ca,Li,K)
 
10.5
Be
 
24
(PO
 
4
)
 
24
· 38H
 
2
O
19.3.10Tiptopite
K
 
2
(Na,Ca)
 
2
Li
 
3
Be
 
6
(PO
 
4
)
 
6
(OH)
 
2
· H
 
2
O
19.3.11Gainesite
Na(Na,K)(Be,Li)Zr
 
2
(PO
 
4
)
 
4
· 1.5-2H
 
2
O
19.3.13Faheyite
(Mn,Mg,Na)Be
 
2
Fe
 
2
(PO
 
4
)
 
4
· 6H
 
2
O
19.3.14Farringtonite
Mg
 
3
(PO
 
4
)
 
2
19.3.15Holtedahlite
Mg
 
2
(PO
 
4
)(OH)
19.3.16Althausite
Mg
 
4
(PO
 
4
)
 
2
(OH,O)(F,☐)
19.3.17Newberyite
Mg(HPO
 
4
) · 3H
 
2
O
19.3.18Phosphorrösslerite
Mg(HPO
 
4
) · 7H
 
2
O
19.3.19Bobierrite
Mg
 
3
(PO
 
4
)
 
2
· 8H
 
2
O
19.3.20Barićite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
· 8H
 
2
O
19.3.21Panethite
(Na,Ca)
 
2
(Mg,Fe
2+
 
)
 
2
(PO
 
4
)
 
2
19.3.22Dittmarite
(NH
 
4
)Mg(PO
 
4
) · H
 
2
O
19.3.23Struvite
(NH
 
4
)Mg(PO
 
4
) · 6H
 
2
O
19.3.24Hannayite
(NH
 
4
)
 
2
Mg
 
3
H
 
4
(PO
 
4
)
 
4
· 8H
 
2
O

Other Names for Roscherite

Other Languages:
German:Roscherit
Russian:Росчерит
Simplified Chinese:水磷铍锰石
Spanish:Roscherita
Traditional Chinese:水磷鈹錳石

Other Information

Fluorescence in UV light:Not fluorescent in UV
Other Information:Soluble in acids.
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 Roscherite

Reference List:

- +
Slavík (1914) Česká Akademie véd a umĕnē u Praze - Bull. intern. ac. sc. Bohême, no. 4.

Larsen, E.S. and Berman, H. (1934) The Microscopic Determination of the Nonopaque Minerals, Second edition, USGS Bulletin 848: 174.

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.: 968-969.

Lindberg, M.L. (1958) The beryllium content of roscherite from the Sapucaia pegmatite mine, Minas Gerais, Brazil, and from other localities. American Mineralogist: 43: 824–838.

Fanfani, L., P.F. Zanazzi, and A.R. Zanzari (1977) The crystal structure of a triclinic roscherite. Tschermaks Mineral. Petrog. Mitt., 24, 169–178.

American Mineralogist (1978): 63: 427.

Clark, A.M., E.E. Fejer, A.G. Couper, O. von Knorring, R.W. Turner, and R.W. Barstow (1983) Iron-rich roscherite from Gunnislake, Cornwall. Mineralogical Magazine: 47: 81–83.

Leavens, P.B., J.S. White, and J.A. Nelen (1990) Zanazziite, a new mineral from Minas Gerais, Brazil. Mineralogical Record, 21, 413–417.

Tschermaks Mineralogische und Petrographische Mitteilungen: 22: 266-277. (for triclinic 'roscherite')

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.: 504.

Rastsvetaeva, R.K., Chukanov, N.V., Verin, I.A. (2005): Crystal structure of roscherite. Doklady Chemistry, 403, 160-163.

Internet Links for Roscherite

Search Engines:
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  • External Links:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Roscherite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Search for Roscherite on Well-Arranged Molecules
  • Buy from McDougall Minerals
  • Wilensky Fine Minerals
  • Roscherite specimens for sale - minfind.com
  • Buy from David K Joyce minerals
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  • Fabre Minerals - search for Roscherite specimens
  • rare and unusual minerals mainly crystallized
  • Lapis Mineral Magazin
  • Find Roscherite on www.crystalclassics.co.uk
  • The Arkenstone - Fine Minerals
  • Specimens:The following Roscherite specimens are currently listed for sale on minfind.com.

    Localities for Roscherite

    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
     
    • Carinthia
      • Koralpe
        • Moschkogel - Weinebene area
          • Brandrücken
    G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
    Brazil
     
    • Minas Gerais
      • Doce valley
        • Água Boa
    Dunn, P.J., Leavens, P.B., Sturman, B.D.,Gaines, R.V. & Barbosa, C. d. P. (1978): Hureaulite and Barbosalite from Lavra do Criminoso, Minas Gerais, Brazil. Mineralogical Record. 9: 147-151
        • Conselheiro Pena
    Canadian Mlneralogist Vol. 20, pp. 87-89 (1982)
        • Divino das Laranjeiras
          • Linópolis
    Cassedanne, J.P. (1983): Famous mineral localities: The Córrego Frio mine and vicinity, Minas Gerais, Brazil. Mineralogical Record, 14 (4): 227-237
        • Galiléia
          • Laranjeiras
    [MinRec 12:69]
          • Sapucaia do Norte
    Cassedanne, J.P. & Baptista, A. (1999): Famous Mineral Localities: The Sapucaia Pegmatite Minas Gerais, Brazil. Mineralogical Record, 30: 347-360 + 365.
      • Jequitinhonha valley
        • Itinga
          • Jenipapo district
    Roberto Bosi collection
          • Monte Belo
          • Taquaral
    [MinRec 21:413]; Moore, P. B., & Ito, J. (1978). I, Whiteite, a new species, and a proposed nomenclature for the jahnsite-whiteite complex series; II, New data on xanthoxenite; III, Salmonsite discredited. Mineralogical Magazine, 42(323), 309-323.
    Bulgaria
     
    • Haskovo Oblast (Khaskovo Oblast)
      • Mineralni Bani Obshtina
        • Spachievo ore field (Spahievo ore field)
    http://www.bgd.bg/CONFERENCES/Conferencia_2004/pdf_files/Kunov.pdf
    Germany
     
    • Saxony
      • Erzgebirge
        • Ehrenfriedersdorf
    Slavik, F. (1914): Neue Phosphate vom Greifenstein bei Ehrenfriedersdorf.- Bulletin international de l’ Academie des Sciences de Bohéme, 19, 1-16; 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: 783, 969.
        • Schmiedeberg
    Frank Zschäbitz, Walter Hajek, Roland Stenzel (2011) Neufunde von Kolbeckit, Hübnerit und Roscherit aus Sadisdorf, Sachsen. Lapis, 36, #7-8, 37-39.
    Italy
     
    • Lombardy
      • Lecco Province
        • Colico
    Vignola, P., Fransolet, A.M., Guastoni, A. & Appiani, R. (2011). Le pegmatiti di Piona. Recenti studi sui filoni Malpensata, Luna e Sommafiume. Rivista Mineralogica Italiana, 1/2011, 30-38
    Portugal
     
    • Guarda District
      • Sabugal
        • Bendada
    Schnorrer-Köhler (1991), Mineral Occurrences.
    UK
     
    • England
      • Cornwall
        • Callington District
          • Calstock
            • Gunnislake
              • Clitters United Mines
    Clark, A.M., Fejer, E.E., Couper, A.G., von Knorring, O., Turner, R.W., and Barstow, R.W. (1983): Mineralogical Magazine 47, 81-83; Golley, P., and Williams, R. (1995): Cornish Mineral Reference Manual. Endsleigh Publications (Truro), 104 pp.
    USA
     
    • Connecticut
      • Middlesex Co.
        • East Hampton (Chatham)
          • Cobalt
    Rocks & Min.: 70:403
    • Maine
      • Cumberland Co.
        • Baldwin
          • West Baldwin
    Thompson, W.B., et,al., 2000, Rocks & Minerals, vol. 75, no. 6, pgs 408-418; Mineral News (2000) 16:1 pp1,4,5
      • Oxford Co.
        • Buckfield
    King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1, King, V. (ed.), 2000, Mineralogy of Maine, V. 2.
        • Newry
    Dunn, P.J. & Gaines, R.V. (1978): Uralolite from the Dunton Gem Mine, Newry, Maine: A second occurrence. Mineralogical Record 9(2), 99-100
    King, V. and Foord, E., 1994, Mineralogy of Maine, V. 1; King, V. (ed), 2000, Mineralogy of Maine, V. 2
    King, V, 2006, Minerals of Halls Ridge and Plumbago-Puzzle Mountain, Newry, Oxford County, Maine, Mineral News, v. 22 (6), p. 1-3.
        • Paris
    King, V. T. and Foord, E. E., 1994, Mineralogy of Maine, Descriptive Mineralogy, volume 1, Maine Geological Survey, Augusta, Maine, USA, pp. 418 + 88 plates. Mineralogical Record 22:382
        • Rumford
    King & Foord, 1994. Mineralogy of Maine, V. 1.; King and Foord, 2000, Addenda to Volume 1, Mineralogy of Maine, v. 2.
    • New Hampshire
      • Grafton Co.
        • Alexandria
    Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
        • Groton
    Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
    No reference listed
      • Sullivan Co.
        • Newport
    Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
    • North Carolina
      • Cleveland Co.
        • Kings Mountain District
    Am Min 54 (1969), 1467-1469; Rocks and Minerals, (1985) 60:76-82; Carolina Geological Society Field Trip Guidebook 1981, 39-48
      • Gaston Co.
        • Bessemer City
    Kenny Gay Collection
    • South Dakota
      • Custer Co.
        • Custer District
          • Fourmile
    Rocks & Minerals: 60: 117; Rocks & Minerals: 79: 342.
    • Tennessee
      • Sevier Co.
        • East Fork District
          • East Fork Mine (East Fork manganese mine)
    Travis A. Paris (2011) Tennessee mineral locality index. Rocks & Minerals, 86, #4, 300-328.
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