POSTITE, Mg(H2O)6Al2(OH)2(H2O)8(V10O28){middle dot}13H2O, A NEW MINERAL SPECIES FROM THE LA SAL MINING DISTRICT, UTAH: CRYSTAL STRUCTURE AND DESCRIPTIVE MINERALOGY

2012 ◽  
Vol 50 (1) ◽  
pp. 45-53 ◽  
Author(s):  
A. R. Kampf ◽  
J. M. Hughes ◽  
J. Marty ◽  
B. Nash
Keyword(s):  
Crystal Structure ◽  
Mineral Species ◽  
New Mineral ◽  
Mining District ◽  
New Mineral Species

scholarly journals SCHLEMAITE, (Cu, )6(Pb,Bi)Se4, A NEW MINERAL SPECIES FROM NIEDERSCHLEMA ALBERODA, ERZGEBIRGE, GERMANY: DESCRIPTION AND CRYSTAL STRUCTURE

2003 ◽  
Vol 41 (6) ◽  
pp. 1433-1444 ◽  
Author(s):  
H.-J. Forster ◽  
M. A. Cooper ◽  
A. C. Roberts ◽  
C. J. Stanley ◽  
A. J. Criddle ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mineral Species ◽  
New Mineral ◽  
New Mineral Species

KIRCHHOFFITE, CsBSi2O6, A NEW MINERAL SPECIES FROM THE DARAI-PIOZ ALKALINE MASSIF, TAJIKISTAN: DESCRIPTION AND CRYSTAL STRUCTURE

2012 ◽  
Vol 50 (2) ◽  
pp. 523-529 ◽  
Author(s):  
A. A. Agakhanov ◽  
L. A. Pautov ◽  
V. Y. Karpenko ◽  
E. Sokolova ◽  
F. C. Hawthorne
Keyword(s):  
Crystal Structure ◽  
Mineral Species ◽  
New Mineral ◽  
New Mineral Species ◽  
Alkaline Massif

Tangdanite, a new mineral species from the Yunnan Province, China and the discreditation of ‘clinotyrolite’

2014 ◽  
Vol 78 (3) ◽  
pp. 559-569 ◽  
Author(s):  
Ma Zhesheng ◽  
Li Guowu ◽  
N. V. Chukanov ◽  
G. Poirier ◽  
Shi Nicheng
Keyword(s):  
Yunnan Province ◽  
Short Wave ◽  
Mineral Species ◽  
Sulfide Deposit ◽  
New Mineral ◽  
Mining District ◽  
Calculated Density ◽  
Cell Parameters ◽  
New Mineral Species ◽  
Perfect Cleavage

AbstractTangdanite, ideally Ca2Cu9(AsO4)4(SO4)0.5(OH)9·9H2O and monoclinic, is a new mineral species (IMA No. 2011-096) occurring in the Tangdan and Nanniping mines, southeast Dongchuan copper mining district, Dongchuan County, Kunming City Prefecture, Yunnan Province, P. R. China (26°11’N 103°51’E). The mineral is found in the oxidized zone (gossan) of an As-bearing Cu sulfide deposit and is clearly of supergene origin. Associated minerals are chalcopyrite, bornite, chalcocite, covellite, tennantite, enargite, cuprite, malachite, azurite, copper and brochantite. Crystals form radiating or foliated aggregates of flaky crystals up to 3 mm, flattened parallel to (100) and elongated along [001]. It is emerald green with a light green streak, translucent and has a pearly to silky lustre. It is sectile having perfect cleavage on {100} although neither parting nor fracture was observed. No fluorescence in long- or short-wave ultraviolet radiation was observed. The hardness is VHN50 42.0−43.6, mean 42.8 kg mm−2 (2−2½ on the Mohs scale). The density measured by pycnometry is 3.22 g cm−3 (Ma et al., 1980). The calculated density from the empirical chemical formula is 3.32 g cm−3. The compatability index gives 1 − (Kp/Kc) = −0.041 (good). The empirical formula (based on 36 O a.p.f.u) of tangdanite is Ca2.05Cu9.08(As1.03O4)4(S0.63O4)0.5(OH)9·9H2.04O. The simplified formula is Ca2Cu9(AsO4)4(SO4)0.5(OH)9·9H2O. The strongest five reflections in the X-ray powder-diffraction pattern [d in Å(I) (hkl)] are: 4.782(100) ( 1 1), 4.333(71) (6 0 2), 5.263(54) ( 0 2), 3.949(47) (8 0 2) and 2.976(46) ( 1 1). The unit-cell parameters are a = 54.490(9), b = 5.5685(9), c = 10.4690(17) Å, β = 96.294(3)o, V = 3157.4(9) Å3, Z = 4. Its structure was solved and refined in space group C2/c, with R = 0.110.

Lusernaite-(Y), Y4Al(CO3)2(OH,F)11{middle dot}6H2O, a new mineral species from Luserna Valley, Piedmont, Italy: Description and crystal structure

2013 ◽  
Vol 98 (7) ◽  
pp. 1322-1329 ◽  
Author(s):  
C. Biagioni ◽  
E. Bonaccorsi ◽  
F. Camara ◽  
M. Cadoni ◽  
M. E. Ciriotti ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mineral Species ◽  
New Mineral ◽  
New Mineral Species

FLUORVESUVIANITE, Ca19(Al,Mg,Fe2+)13[SiO4]10[Si2O7]4O(F,OH)9, A NEW MINERAL SPECIES FROM PITKARANTA, KARELIA, RUSSIA: DESCRIPTION AND CRYSTAL STRUCTURE

2003 ◽  
Vol 41 (6) ◽  
pp. 1371-1380 ◽  
Author(s):  
S. N. Britvin ◽  
A. A. Antonov ◽  
S. V. Krivovichev ◽  
T. Armbruster ◽  
P. C. Burns ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mineral Species ◽  
New Mineral ◽  
New Mineral Species

PUTZITE, (Cu4.7Ag3.3) 8GeS6, A NEW MINERAL SPECIES FROM CAPILLITAS, CATAMARCA, ARGENTINA: DESCRIPTION AND CRYSTAL STRUCTURE

2004 ◽  
Vol 42 (6) ◽  
pp. 1757-1769 ◽  
Author(s):  
W. H. Paar ◽  
A. C. Roberts ◽  
P. Berlepsch ◽  
T. Armbruster ◽  
D. Topa ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mineral Species ◽  
New Mineral ◽  
New Mineral Species
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