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Roscherite

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Formula:
Ca2Mn52+Be4(PO4)6(OH)4 · 6H2O
System:
Monoclinic
Colour:
Brown, red, orange, ...
Hardness:
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:
Isostructural with:
Roscherite Group.

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

Classification of Roscherite

Approved
8.DA.10

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

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

19 : Phosphates
3 : Phosphates of Be and Mg
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First Recorded Occurrence of Roscherite

Place of Conservation of First Recorded 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 First Recorded Material:
Granite
Associated Minerals at First Recorded Locality:

Occurrences of Roscherite

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

Physical Properties of Roscherite

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:
2.90 - 2.97 g/cm3 (Measured)    2.77(8) g/cm3 (Calculated)

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 Data:
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
Max Birefringence:
δ = 0.019 - 0.022
Image 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:
Ca2Mn52+Be4(PO4)6(OH)4 · 6H2O
Essential elements:
All elements listed in formula:

Relationship of Roscherite to other Species

Other Members of Group:
AtencioiteCa2Fe32+Mg2Be4(PO4)6(OH)4 · 6H2O
FootemineiteCa2Mn2+Mn22+Mn22+Be4(PO4)6(OH)4 · 6H2O
GreifensteiniteCa2Fe52+Be4(PO4)6(OH)4 · 6H2O
GuimarãesiteCa2(Zn,Mg,Fe2+)5Be4(PO4)6(OH)4 · 6H2O
OkruschiteCa2Mn52+Be4(AsO4)6(OH)4·6H2O
RuifrancoiteCa22(Fe3+,Mn2+,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O
ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O
8.DA.05BearsiteBe2(AsO4)(OH) · 4H2O
8.DA.05MoraesiteBe2(PO4)(OH) · 4H2O
8.DA.10ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O
8.DA.10GreifensteiniteCa2Fe52+Be4(PO4)6(OH)4 · 6H2O
8.DA.10AtencioiteCa2Fe32+Mg2Be4(PO4)6(OH)4 · 6H2O
8.DA.10RuifrancoiteCa22(Fe3+,Mn2+,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2O
8.DA.10GuimarãesiteCa2(Zn,Mg,Fe2+)5Be4(PO4)6(OH)4 · 6H2O
8.DA.10FootemineiteCa2Mn2+Mn22+Mn22+Be4(PO4)6(OH)4 · 6H2O
8.DA.15UraloliteCa2Be4(PO4)3(OH)3 · 5H2O
8.DA.20WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2O
8.DA.25TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2O
8.DA.30Veszelyite(Cu,Zn)2Zn(PO4)2 · 2H2O
8.DA.35Kipushite(Cu,Zn)5Zn(PO4)2(OH)6 · H2O
8.DA.35Philipsburgite(Cu,Zn)6(AsO4,PO4)2(OH)6 · H2O
8.DA.40SpenceriteZn4(PO4)2(OH)2 · 3H2O
8.DA.45GlucineCaBe4(PO4)2(OH)4 · 0.5H2O
8.DA.50Ianbruceite[Zn2(OH)(H2O)(AsO4)](H2O)2
19.3.1MoraesiteBe2(PO4)(OH) · 4H2O
19.3.2BerylloniteNaBePO4
19.3.3HurlbutiteCaBe2(PO4)2
19.3.4HydroxylherderiteCaBe(PO4)(OH,F)
19.3.5GlucineCaBe4(PO4)2(OH)4 · 0.5H2O
19.3.6FransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2O
19.3.7UraloliteCa2Be4(PO4)3(OH)3 · 5H2O
19.3.9PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2O
19.3.10TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2O
19.3.11GainesiteNa(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2O
19.3.13Faheyite(Mn,Mg,Na)Be2Fe2(PO4)4 · 6H2O
19.3.14FarringtoniteMg3(PO4)2
19.3.15HoltedahliteMg2(PO4)(OH)
19.3.16AlthausiteMg4(PO4)2(OH,O)(F,☐)
19.3.17NewberyiteMg(HPO4) · 3H2O
19.3.18PhosphorrössleriteMg(HPO4) · 7H2O
19.3.19BobierriteMg3(PO4)2 · 8H2O
19.3.20Barićite(Mg,Fe)3(PO4)2 · 8H2O
19.3.21Panethite(Na,Ca)2(Mg,Fe2+)2(PO4)2
19.3.22Dittmarite(NH4)Mg(PO4) · H2O
19.3.23Struvite(NH4)Mg(PO4) · 6H2O
19.3.24Hannayite(NH4)2Mg3H4(PO4)4 · 8H2O

Other Names for Roscherite

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

Other Information

Not fluorescent in UV
Other Information:
Soluble in acids.
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 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

Localities for Roscherite

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
 
  • 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.
Mineral and/or Locality  
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