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Moraesite

A valid IMA mineral species - grandfathered
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09515980014977118291275.jpg
Moraesite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
03443360014948552954404.jpg
Moraesite

Pomarolli farm, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
01849220014977628072123.jpg
Moraesite

Sapucaia mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil
07393520014948291463735.jpg
Moraesite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
04497250014953828879563.jpg
Moraesite

Pomarolli farm, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
01849220014977628072123.jpg
Moraesite

Sapucaia mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil
07393520014948291463735.jpg
Moraesite

Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
05197670014978242447409.jpg
Moraesite

Pomarolli farm, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil
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About MoraesiteHide

09393260014948408622958.jpg
Luciano Jacques de Moraes (1896–1968)
Formula:
Be2(PO4)(OH) · 4H2O
Colour:
White
Lustre:
Silky
Specific Gravity:
1.805
Crystal System:
Monoclinic
Name:
Named in 1953 by Marie Louise Lindberg (Smith), William T. Pecora, and Aluízio Licínio de Miranda Barbosa in honor of Dr. Luciano Jacques de Moraes [1896–1968], Brazilian mineralogist and geologist.
This page provides mineralogical data about Moraesite.


Unique IdentifiersHide

Mindat ID:
2778
Long-form identifier:
mindat:1:1:2778:2
GUID
(UUID V4):
cfffee08-ca16-4043-82f1-b3c84bd6e0ac

IMA Classification of MoraesiteHide

Classification of MoraesiteHide

Strunz-mindat (2024):
8.DA.05

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
A : With small (and occasionally larger) cations
Dana 8th ed.:
42.6.1.1

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
6 : A2(XO4)Zq·xH2O
Hey's CIM Ref.:
19.3.1

19 : Phosphates
3 : Phosphates of Be and Mg

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
MaeIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of MoraesiteHide

Lustre:
Silky
Transparency:
Translucent
Colour:
White
Streak:
White
Cleavage:
Perfect
Parallel to b and c axes.
Density:
1.805 g/cm3 (Measured)    1.806 g/cm3 (Calculated)
Comment:
Measured with a pycnometer

Optical Data of MoraesiteHide

Type:
Biaxial (-)
RI values:
nα = 1.462 nβ = 1.482 nγ = 1.490
2V:
Measured: 65° , Calculated: 62°
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v strong
Optical Extinction:
Z = b, Y ∧ c = 11°.

Chemistry of MoraesiteHide

Mindat Formula:
Be2(PO4)(OH) · 4H2O
Elements listed:
Be, H, O, P - search for minerals with similar chemistry

Crystallography of MoraesiteHide

Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Bb
Setting:
Cc
Cell Parameters:
a = 8.553(6) Å, b = 36.957(18) Å, c = 7.155(8) Å
β = 97.93°
Ratio:
a:b:c = 0.231 : 1 : 0.194
Unit Cell V:
2,240.02 ų (Calculated from Unit Cell)
Z:
12
Morphology:
Acicular parallel to the c-axis [001], and tabular parallel to the orthopinacoid {100}. The pyramid face (131) is usually better developed than (131) and in some crystals gives the general appearance of a basal plane of a triclinic mineral. The faces (130) and (130) are better developed than (130) and (130). The orthopinacoid and prism faces of the forms {100} and {130} are striated parallel to the c-axis.

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011025MoraesiteMerlino S, Pasero M (1992) Crystal chemistry of beryllophosphates: The crystal structure of moraesite, Be2(PO4)(OH)*4H2O Zeitschrift fur Kristallographie 201 253-2621992Humaita, Brazil0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.00 Å(100)
3.278 Å(90)
4.24 Å(60)
3.023 Å(60)
2.819 Å(60)
6.15 Å(40)
2.325 Å(40)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Near-surface Processes
22 : Hydration and low-𝑇 subsurface aqueous alteration (see also #23)

Type Occurrence of MoraesiteHide

Type Locality:
ⓘ Sapucaia mine, Sapucaia do Norte, Galiléia, Minas Gerais, Brazil
General Appearance of Type Material:
Occurs in tufted or radial aggregates, in fibrous coatings, or in spherulitic masses Delicate needles grade into crusts with a coarse fibrous structure. Crystals are minute singly terminated needle-like laths.
Place of Conservation of Type Material:
National Museum, Rio de Janeiro, Brazil.
National School of Mines, Paris, France, number 50740.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, number 106577.
Geological Setting of Type Material:
Pegmatite
Associated Minerals at Type Locality:
QuartzMuscoviteFrondeliteBerylAlbite
Reference:
Lindberg, M.L., Pecora, W.T., Barbosa, A.L.M. (1953) Moraesite, a new hydrous beryllium phosphate from Minas Gerais, Brazil. American Mineralogist: 38: 1126-1133.
Download:
https://rruff.info/rruff_1.0/uploads/AM38_1126.pdf

Other Language Names for MoraesiteHide

German:Moraesit
Spanish:Moraesita

Common AssociatesHide

Associated Minerals Based on Photo Data:
12 photos of Moraesite associated with BerylloniteNaBePO4
9 photos of Moraesite associated with ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2O
8 photos of Moraesite associated with HydroxylherderiteCaBe(PO4)(OH)
6 photos of Moraesite associated with RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2O
6 photos of Moraesite associated with QuartzSiO2
5 photos of Moraesite associated with GreifensteiniteCa2Fe2+5Be4(PO4)6(OH)4 · 6H2O
5 photos of Moraesite associated with EosphoriteMn2+Al(PO4)(OH)2 · H2O
5 photos of Moraesite associated with BerylBe3Al2(Si6O18)
4 photos of Moraesite associated with Wilancookite(Ba5Li2◻)Ba6Be24P24O96 · 26H2O
3 photos of Moraesite associated with TourmalineAD3G6 (T6O18)(BO3)3X3Z

Related Minerals - Strunz-mindat GroupingHide

8.DA.05BearsiteBe2(AsO4)(OH) · 4H2OMon.
8.DA.10RoscheriteCa2Mn2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/m
8.DA.10ZanazziiteCa2Mg5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.10GreifensteiniteCa2Fe2+5Be4(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.10AtencioiteCa2Fe2+3Mg2Be4(PO4)6(OH)4 · 6H2OTric. 1 : P1
8.DA.10RuifrancoiteCa2(◻,Mn)2(Fe3+,Mn,Mg)4Be4(PO4)6(OH)4(OH,H2O)2 · 4H2OMon. 2/m : B2/b
8.DA.10GuimarãesiteCa2Be4Zn5(PO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.10FootemineiteCa2Mn2+Mn2+2Mn2+2Be4(PO4)6(OH)4 · 6H2OTric. 1 : P1
8.DA.10OkruschiteCa2Mn2+5Be4(AsO4)6(OH)4 · 6H2OMon. 2/m : B2/b
8.DA.15UraloliteCa2Be4(PO4)3(OH)3 · 5H2OMon. 2/m
8.DA.20WeinebeneiteCaBe3(PO4)2(OH)2 · 4H2OMon. m : Bb
8.DA.25TiptopiteK2(Na,Ca)2Li3Be6(PO4)6(OH)2 · H2OHex. 6 : P63
8.DA.40SpenceriteZn4(PO4)2(OH)2 · 3H2OMon. 2/m : P2/b
8.DA.45GlucineCaBe4(PO4)2(OH)4 · 0.5H2O

Other InformationHide

Notes:
Soluble in dilute HCl, HNO3, and H2SO4.
When heated, it decrepitates, giving off water, but does not fuse into a globular mass.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for MoraesiteHide

References for MoraesiteHide

Localities for MoraesiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
    • Coolgardie Shire
      • Nepean
Pinch (1978)
Brazil
 
  • Minas Gerais
    • Divino das Laranjeiras
      • Linópolis
Mineralogical Record 24: 384-385
In Coll. M. Slama +1 other reference
Atencio et al. (2005)
Menezes (n.d.)
    • Galiléia
      • Sapucaia do Norte
Lindberg et al. (1953)
    • Itinga
Cassedanne et al. (1987)
Sergio Varvello collection
      • Monte Belo
Sergio Varvello collection
      • Taquaral
        • Piauí valley
Chukanov et al. (2007)
Luis Menezes +1 other reference
    • Mendes Pimentel
Pers. Comm. from Paulo Anselmo Matioli
Atencio et al. (2005)
Finland
 
  • Pirkanmaa
    • Orivesi
      • Eräjärvi area
Sandström et al. (2009)
France
 
  • Occitanie
    • Aveyron
      • Villefranche-de-Rouergue
        • La Capelle-Bleys
Boisson et al. (2014)
Germany
 
  • Bavaria
    • Lower Bavaria
      • Freyung-Grafenau District
        • Waldkirchen
          • Oberfrauenwald
Habel (1995)
      • Passau District
        • Tittling
          • Hötzendorf
Habel M. et al. (1994)
Namibia
 
  • ǁKaras Region
    • Karasburg East
      • Tantalite Valley
von Bezing (2007)
Peru
 
  • Puno
    • Carabaya Province
O'Connor et al. (2018)
Li (2016)
Russia
 
  • Chelyabinsk Oblast
    • Kaslinsky District
Pekov (1998)
  • Murmansk Oblast
 ...
    • Lovozersky District
Arzamastsev et al. (2008)
Pekov (2000)
  • Zabaykalsky Krai
    • Ononsky District
      • Durulgui pegmatite field
Lykova I. S. et al. (2017)
USA
 
  • Connecticut
    • Middlesex County
      • East Hampton (Chatham)
        • Cobalt
Schooner (1961) +1 other reference
      • Portland
        • Collins Hill
          • Strickland pegmatite
Moritz (n.d.)
  • Maine
    • Cumberland County
      • Baldwin
        • West Baldwin
Collections of Elmar Lackner and Jason ...
    • Oxford County
      • Greenwood
        • Uncle Tom Mountain
Mineral News (1995) +1 other reference
      • Newry
King et al. (1994) +1 other reference
King et al. (1994) +1 other reference
King et al. (1994) +1 other reference
      • Paris
Mineralogical Record 22:382 +1 other reference
www.mindat.org (n.d.) +1 other reference
  • New Hampshire
    • Cheshire County
      • Walpole
Tom Mortimer (Oct. 2010) +1 other reference
    • Grafton County
      • Alexandria
Smith (2005) +1 other reference
      • Groton
Rocks & Min. 80:251
Smith (2005)
Moore (1973) +1 other reference
Janules +1 other reference
      • Orange
Thompson et al. (2022)
    • Sullivan County
      • Newport
Smith (2005)
  • North Carolina
    • Cleveland County
      • Kings Mountain
Smithsonian Institution Mineral ...
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