Roscherite Mineral Data

Roscherite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Tsumeb Mine] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa and Mastercard are Welcome

General Roscherite Information

Chemical Formula:

Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)

Composition:

Molecular Weight = 1,097.90 gm

Calcium 3.65 % Ca 5.11 % CaO

Manganese 18.76 % Mn 24.23 % MnO

Beryllium 3.28 % Be 9.11 % BeO

Iron 6.36 % Fe 8.18 % FeO

Phosphorus 16.93 % P 38.79 % P₂O₅

Hydrogen 1.47 % H 13.13 % H₂O

Oxygen 49.55 % O

______ ______

100.00 % 98.54 % = TOTAL OXIDE

Empirical Formula:

CaMn²⁺_3.75Fe²⁺_1.25Be₄(PO₄)₆(OH)₄·6(H₂O)

Environment:

Cavities in granite. Two polymorphs recorded, A (triclinic) and M (monoclinic).

IMA Status:

Valid Species (Pre-IMA) 1914

Locality:

Greifenstein, near Ehrenfridersdorf, Saxony, Germay. Link to MinDat.org Location Data.

Name Origin:

Named for Walter Roscher, mineral collector of Ehrenfriedsdorf, Germany.

Roscherite Image

Images:

Roscherite Hurlbutite

Comments: White, round crystal clusters of hurlbutite on reddish brown roscherite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Roscherite Parafransoletite

Comments: White, crystalline aggregate sprays of parafransoletite on dark reddish brown roscherite with massive, white, sucrosic whitlockite.
Location: Tip Top mine, Custer County, South Dakota, USA. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Images:

Roscherite Englishite

Comments: Black crystalline aggregate of roscherite on white englishite.
Location: Tip Top mine, Custer, Custer County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Roscherite Viitaniemiite

Comments: Colorless to pink viitaniemiite with brownish roscherite.
Location: Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Images:

Roscherite Ushkovite

Comments: Translucent ushkovite microcrystals with orange roscherite on feldspar.
Location: Galileia, Minas Gerais, Brazil. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Roscherite Crystallography

Axial Ratios:

a:b:c =1.3306:1:0.5633

Cell Dimensions:

a = 15.921, b = 11.965, c = 6.741, Z = 2; alpha = 91.067°, beta = 94.35°, gamma = 89.942° V = 1,280.20 Den(Calc)= 2.85

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: C1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.96(1), 9.58(0.9), 3.18(0.7),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 0 1 0] [ 1 0 1] [ 1 1 0] [ 1 0 0] [ 0 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Fanfani L , Zanazzi P F , Zanzari A R , Tschermaks Mineralogische und Petrographische Mitteilungen , 24 (1977) p.169-178, The crystal structure of a triclinic roscherite, Note: B(3,3) changed from .00848 to .00488 to match reported Biso, Locality: Foote Mine, North Carolina, USA

Physical Properties of Roscherite

Cleavage:

[001] Good, [010] Distinct

Color:

Light brown, Dark brown, Olive green, Orange red, Red.

Density:

2.934

Habit:

Pistolitic - > 3mm rounded spherical grains.

Hardness:

4.5 - Between Fluorite and Apatite

Streak:

light brown

Optical Properties of Roscherite

Gladstone-Dale:

CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.055 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2229,KPDmeas= 0.2165,KC= 0.2113

Optical Data:

Biaxial (-), a=1.624, b=1.639, g=1.643, bire=0.0190

Calculated Properties of Roscherite

Electron Density:

r_electron=2.89 gm/cc
note: r_Roscherite=2.93 gm/cc.

Fermion Index

Fermion Index = 0.03447
Boson Index = 0.96553

Photoelectric:

PE_Roscherite= 7.93 barns/electron
U=PE_Roscherite x r_electron= 22.90 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Roscherite is Not Radioactive

Roscherite Classification

Dana Class:

42.7.7.1 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.7)where (AB)5 (XO4)3 Zq · x(H2O)

(42.7.7)Dana Group

42.7.7.1 Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4·6(H2O) C1 1

42.7.7.3 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4·6(H2O) C 2/c 2/m

42.7.7.4 Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4·6(H2O) C 2/c 2/m

42.7.7.5 IMA2004-041! Ca2Fe[]Mg2Fe2Be4(PO4)6(OH)4·6(H2O) P1 1

Strunz Class:

VII/D.01-60 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, mostly cations of small size: Be, Li

VII/D.01 - Moraesite - Uralolite - Roscherite series

VII/D.01-10 Moraesite Be2(PO4)(OH)·4(H2O) Cc,C 2/c Mono

VII/D.01-20 Bearsite Be2(AsO4)(OH)·4(H2O) Cc or C 2/c Mono

VII/D.01-30 Glucine CaBe4(PO4)2(OH)4·0.5(H2O) ? Mono

VII/D.01-35 Weinebeneite CaBe3(PO4)2(OH)2·5(H2O) Cc m

VII/D.01-40 Uralolite Ca2Be4(PO4)3(OH)3·5(H2O) P 2₁/n 2/m

VII/D.01-50 Zanazziite Ca2(Mg,Fe)(Mg,Fe,Al,Mn,Fe)4Be4(PO4)6(OH)4·6(H2O) C 2/c 2/m

VII/D.01-55 Greifensteinite! Ca2Be4(Fe,Mn)5(PO4)6(OH)4·6(H2O) C 2/c 2/m

VII/D.01-60 Roscherite Ca(Mn,Fe)5Be4(PO4)6(OH)4·6(H2O) C1 1

Other Roscherite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Roscherite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST

Search for Roscherite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Roscherite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Roscherite Mineral Data :

Ask about Roscherite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Roscherite Specimen Label here :

Roscherite

Ca(Mn++,Fe++)5Be4(PO4)6(OH)4·6(H2O)
Dana No: 42.7.7.1 Strunz No: VII/D.01-60
Locality:

Notes: