Camgasite
A valid IMA mineral species
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Formula:
CaMg(AsO4)(OH) · 5H2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
2
Crystal System:
Monoclinic
Name:
Named for its chemical composition (Ca, Mg, As).
This page provides mineralogical data about Camgasite.
Unique Identifiers
Mindat ID:
874
Long-form identifier:
mindat:1:1:874:3
GUID
(UUID V4):
(UUID V4):
f28d5a51-39fc-4019-8b09-4c3a55bd4d81
Classification of Camgasite
Approved
First published:
1989
8.DJ.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
J : With large and medium-sized cations, (OH, etc.):RO4 = 1:1
42.7.16.1
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
7 : (AB)2(XO4)Zq·xH2O
20.2.20
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
20 : Arsenates (also arsenates with phosphate, but without other anions)
2 : Arsenates of Be, Mg, Ca or Ba
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cmg | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Camgasite
Optical Data of Camgasite
Type:
Biaxial (+)
RI values:
nα = 1.540 nβ = 1.548 nγ = 1.563
2V:
Measured: 74° , Calculated: 74°
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r < v
Chemical Properties of Camgasite
Formula:
CaMg(AsO4)(OH) · 5H2O
Crystallography of Camgasite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 9.18 Å, b = 7.63 Å, c = 16.27 Å
β = 128°
β = 128°
Ratio:
a:b:c = 1.203 : 1 : 2.132
Unit Cell V:
898.02 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
7.28 Å | (10) |
6.42 Å | (10) |
4.00 Å | (8) |
3.28 Å | (8) |
3.21 Å | (8) |
3.02 Å | (8) |
2.96 Å | (8) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Camgasite
General Appearance of Type Material:
Forms crusts on an adit wall which consist of euhedral to anhedral crystals, to 0.15 mm, prismatic along [010]; faces: {100}, {010}, {001}; also radial aggregates in crusts.
Place of Conservation of Type Material:
Stuttgart University, Stuttgart, Germany, number JO1k,1.
Geological Setting of Type Material:
Secondary mineral in a Co–U-rich zone within a polymetallic mineral deposit.
Associated Minerals at Type Locality:
Synonyms of Camgasite
Other Language Names for Camgasite
Related Minerals - Strunz-mindat Grouping
8.DJ.05 | Johnwalkite | K(Mn2+,Fe2+,Fe3+)2(Nb5+,Ta5+)(PO4)2O2 · 2(H2O,OH) |
8.DJ.05 | Olmsteadite | KFe2+2(Nb5+,Ta5+)(PO4)2O2 · 2H2O |
8.DJ.10 | Gatumbaite | CaAl2(PO4)2(OH)2 · H2O |
8.DJ.20 | Phosphofibrite | (H2O,K)3.5Fe8(PO4)6(OH)7 · 5H2O |
8.DJ.20 | Meurigite-K | KFe3+8(PO4)6(OH)7 · 6.5H2O |
8.DJ.20 | Meurigite-Na | NaFe3+8(PO4)6(OH)7 · 6.5H2O |
8.DJ.25 | Jungite | Ca2Zn4Fe3+8(PO4)9(OH)9 · 16H2O |
8.DJ.30 | Wycheproofite | NaAlZr(PO4)2(OH) · H2O |
8.DJ.35 | Ercitite | Na2Mn3+2(PO4)2(OH)2 · 4H2O |
8.DJ.40 | Mrázekite | Bi2Cu3(PO4)2O2(OH)2 · H2O |
8.DJ.45 | Attikaite | Ca3Cu2Al2(AsO4)4(OH)4 · 2H2O |
8.DJ.50 | Mengeite | Ba(Mg,Mn2+)Mn3+4(PO4)4(OH)4 · 4H2O |
Other Information
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 Camgasite
mindat.org URL:
https://www.mindat.org/min-874.html
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References for Camgasite
Reference List:
Localities for Camgasite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Germany (TL) | |
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